Well i take it that you are going to want a normal ATX motherboard correct?
Also it would be helpful in knowing what kind of tool you are using to bend. But first, From my understanding you want to buy a sheet of perspex and bend it 4 times so that it makes a box and then by 2 side panels seperately?
Ok so, A normal Mid-tower sized case is 18" Height x 8 1/2" Width x 18" Depth.
So from that information: Buy a sheet of perspex that is 72" by 8.5" (which I dont even think they make) so measure 18 inches 4 times on your 72 inch sheet and bend it on every measure. Then go buy your window kit for both sides.
SUGGESTION: Spend the extra 80 dollars on this
http://www.xoxide.com/bluvreclca.html instead of wasting alot more money on building your own case. Plus this one comes w/ 5 UV fans.
