[Build Help] Trying to build a desk pc and looking to in-cooperate an open case into it.

I was looking for a case similar to this: http://www.amazon.com/MYOPENPC-Transparent-Computer-Mainboards-compatible/dp/B003CTR3ME/ref=sr_1_1?ie=UTF8&qid=1322791086&sr=8-1

Essentially the back panel where the i/o plate snaps into and the motherboard tray would be sufficient. I am not sure where to look for parts like that, and can't seem to find them. Perhaps someone here has experiences with this, or has suggestions that could help out.