Two things on the car, which looks like you got a good starting point!
1. I built my own bender, patterned off the Speedway motors unit, I enjoyed the build and it works great, I hope yours does too. I use the speedway dies, at $150 per set, it is hard to justify the time and material cost to make your own. But I don't have access to CNC.
2. For parts, especially the Nissan must have stuff, call Rielly Curtis, I hope I spelled that right. He is at Lynchburg Nissan in Va. Great guy, helps out the racers. Their number is 1-800-443-2117. He will really go above and beyond to help a racer out.

Mike