Hello... here is site I have used for Rackmount type of cases...
http://plinkusa.net/ accepts paypal thru their EBAY lists too... I put a micro-atx board with four memory slots, into a 3U chassis that was only 11.81" deep, has mounting for a Standard ATX PowerSupply, and plenty of pre-cut case Fan mounts...
http://www.plinkusa.net/web3013s.htm ... Considerations in this case build are,
1) if you want a CD/DVD drive, you need to consider the type of CPU FAN you use, for height clearance...
2) mine came with four 60mm front mounted fans @12vdc, I changed wire for 5vdc quiet operation.
3) for full size PCI-e Video card, cut slot into the Drive bay shelf for clearance... but will not affect mounting of drives.
Was a tight fit... but was very happy with the results for Rackmounting a PC, using Standard Parts, 3U size, 12" deep, and under $100 case.
post edited by IronSound - 2013/04/15 20:33:08