You could buy a new set from pcandparts
Intel i7-3770 3.4GHz Quad Core System ( 8MB Cache- Quad Core ) Intel Power PCII
ThermalTake VM400M1W2Z V9 BlacX Edition W/Dual Bay EasySwap HDD Docking Station & USB 3.0 Connectors + Side Panel + Thermaltake LT-700P Litepower 700W PSU
Intel Core i7-3770 3.4GHz 8MB Quad Core LGA-1155 Original Boxed -Link
Intel DB75EN w/VGA+Sound+SATA+Lan&PCI Express
Seagate 1TB ST1000DM003 7200RPM S-ATA III 64MB Hard Drive
Kingston KVR16N11/8 8GB DDR3-1600 PC3-12800
LG GH24NS90-24X DVDRW - Dual Layer SATA
Sound Built-in
Asus ENGTX550 TI DC TOP/DI/1GD5 GeForce GTX 550Ti 1GB DDR5 w/HDMI
LG IPS224T Wide 21.5" LED Full HD Monitor
Star 120W Speakers Black USB
Microsoft Wired Desktop 400 USB Key+Mouse Spill-Resistant Design Link
Assembly $10.00 ( included )
PC Discount
$1,069.00
http://pcandparts.com/basesys.htm