Hey Shadow, I will look through all my papers from when I lived in the Cities and see if I can find any of the old places I scavanged for parts. There are a lot of junkyards up north of the cities that has almost all the parts you need.
Also check out the Backyard Boggers, they used to hold a mud run every month and alot of them work in junkyyards and can help you find the parts.
Good luck