finding out the make and model of my computer case

[♠Grim♂ Reaper 1666◙ 17]

I have a computer case with no brand name and i want to find information on it since it is a good case and i would like to replace the side panel which is slightly bent (using this as an excuse to try and get one which can fit a case fan and a glass panel)

does any one know where the part number of the case will be?

UPDATED

some images of the case in case it helps

Edited April 24, 2013 by ♠Grim♂ Reaper 1666◙

[BTTFModMachine 260]

Could you...

Identify the motherboard and search on that?

Then, find which computers had that motherboard and narrow down your search.

[♠Grim♂ Reaper 1666◙ 17]

the problem is that it is a custom build, and the case is far older than the motherboard which is 1 year old, while the case must by 5-6 years old