I'm pretty sure that if you go to any local computer store, and explain your situation to them, they might give you the hardware needed.
Had the same thing happen to me with my first system. Someone gave me a case, went to a local shop, and they gave me a small ziplock bag full of screws, jumpers, and other assorted goodies.
Even if they charge you a few bucks, it's still cheaper than having to buy a new case.
For those that fought for it, freedom has a taste that the protected will never know.