You know you can do an e46 m3 rear swap. If you take the time to search it can be done for $1000 or less. I'm in the process of trying to finalize my project. Its a direct bolt up. You need the e46 m3 subframe, driveshaft, axles, and diff and thats it.
Mystic Blue ZHP - Suede/Alacantera Interior - OEM Euro Clears