Replacement Note

I got a Dell Optiplex GX280 Desktop (DT) that needs a new case. Where can i get a replacement? ?

Before you comment on this, please note that this is not a normal run of the mill Dell setup. The motherboard is designed where the I/O ports and the PCI slots are reversed from everything i have used to this point.
I want to know if anybody out there can recomend a specific case to put this in other than a replacement Dell case or a custom made one.

So to confirm. When you look at the back of the computer the PCI slots are at the top and the I/O ports are at the bottom?

Is this the tower:

http://support.dell.com/support/edocs/systems/opgx280/en/ug/sffindex.htm

or this:

http://support.dell.com/support/edocs/systems/opgx280/en/ug/sdindex.htm

Update:
This tower may work:

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3756961&CatId=3428

Or one like this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16811129034

Part 1 Capacitor Replacement. antique Radio. (Please note This is part one of four)

B304 FFORDE £1 “G” REPLACEMENT NOTE * EF * M34N 054396 $58.30

BANKNOTE GB 1970 PAGE £1 REPLACEMENT NOTE MW01 265944 $30.69

IRAQ IRAQI NEW DINAR REPLACEMENT NOTES-50+250 DINAR $7.63

10.1″ HP MINI NOTE 110 2410 2140 LED LCD Replacement $119.00

SOUTH AFRICA REPLACEMENT NOTE R10 P120 c VF – SCARCE $34.24

SOUTH AFRICA REPLACEMENT NOTE R5 P119 c VF – SCARCE $28.37

SOUTH AFRICA REPLACEMENT NOTE R2 P118 d UNC – SCARCE $14.68

SOUTH AFRICA REPLACEMENT NOTE R1 P115 a F – SCARCE $16.62

B304 FFORDE £1 “G” REPLACEMENT NOTE * EF * M34N 054395 $58.30

IRAQ 10000 DINAR RARE REPLACEMENT NOTE – COLLECTOR´S $53.80

3x 2600mAh Replacement Battery+USB AC Wall Charger for Samsung N7000 Note i9220 $16.88

3x 2600mAh Replacement Battery+USB AC Wall Charger for Samsung N7000 Note i9220 $16.88

B261 PEPPIATT 1948 £1 REPLACEMENT NOTE * aEF * S05S $327.95

Scotland 1 Pound 1974 REPLACEMENT NOTE, P.111c aUNC $117.41

Germany Federal Rep BDL 5 Deutsche Mark 1948 Ersatznote Replacement Note XF++ $572.35

500,000 ZIMBABWE DOLLARS ZA REPLACEMENT BANK NOTE 8072 $10.75

B323 PAGE £1 REPLACEMENT NOTE * PAIR * UNC * MS78 * $40.81

UZBEKISTAN 3 Sum World Money Currency REPLACEMENT Note $5.86

Yugoslavia 50000 Dinara 1988 REPLACEMENT NOTE P96 ZA @ Fine $8.32

Cambodia P17Aa RARE UNC 1975 Replacement Note Cambodge $45.00

Cambodia P51a RARE UNC 1999 1000 Riels Replacement Note $9.77

Cambodia P52 50 Riels 2002 Replacement Note Khmer $0.97

Laos PNEW 1000 Kip 2008 Replacement Note RARE note withdrawn from circulation $4.88

1974 Cayman Island QE II $25 Replacement (Z1) note .GEM UNC $1,174.05

Cambodia P44a RARE UNC 1995 1000 Riels Replacement Note $4.88

Cambodia P45a RARE UNC 1995 2000 Riels Replacement Note $4.88

Laos P17 500 Kip REPLACEMENT NOTE F+ *V.RARE* $136.96

Laos P18 1000 Kip REPLACEMENT NOTE UNC *VERY.RARE* $244.58

Laos P36 20000 Kip 2003 EE REPLACEMENT NOTE UNC *VERY.RARE* $19.56

IRELAND NORTHERN 1 POUND BANK OF REPLACEMENT ‘Z’ NOTE P65 UNCIRCULATED !! $39.89

3x 2600mAh Replacement Battery+USB AC Wall Charger for Samsung N7000 Note i9220 $16.88

B250 PEPPIATT 1940 £1 REPLACEMENT NOTE * S03H * GVF * $342.53

B325 PAGE 1971 £5 REPLACEMENT NOTE * 11M * GVF * $240.50

B308 FFORDE 1967 £1 REPLACEMENT NOTE * N04M 233776 *aVF $40.81

B308 FFORDE 1967 £1 REPLACEMENT NOTE * T31M 026034 * $43.73

B269 BEALE 1950 £1 REPLACEMENT NOTE * S63S 112197 * aEF $58.30

Netherlands 20 Gulden 1939-41, P.54 REPLACEMENT NOTE $146.76

Cambodia REPLACEMENT 1972-74, 500 Riels Variety 2 notes $39.14

SOMALIA- 20 SHILLINGS 1989 P#33 REPLACEMENT NOTE VF $48.92

500 THOUSAND ZIMBABWE DOLLARS ZA REPLACEMENT BANK NOTE $11.73

500,000 ZIMBABWE DOLLARS ZA REPLACEMENT BANK NOTE ♥RARE $11.73

Philippines, 10 Piso, 1999, P-187 (187e), UNC Scarce Replacement (Star Note) $14.67

B321 PAGE 1970 £1 REPLACEMENT NOTE * S53M 331633 * VF * $8.75

B329 PAGE 1970 £20 REPLACEMENT NOTE * M02 * EF+ * $218.64

B311 FFORDE 1967 10/- REPLACEMENT NOTE * M80 * LAST RUN $43.73

B308 FFORDE 1967 £1 REPLACEMENT NOTE * N08M 888907 * GF $40.81

ENGLAND 10 SHILLINGS FFORDE *M80* LAST REPLACEMENT NOTE $38.36

B325 PAGE 1971 £5 REPLACEMENT NOTE * EF * 12M * $306.09

B272 O’BRIEN 1955 10/- REPLACEMENT NOTE * aVF * 64A * $58.30

B304 FFORDE £1 * G * REPLACEMENT NOTE * GEF * M35N * $91.81