@Jay.
So the car I was talking about will be my track car and as such, gutted of most factory interior and some exterior items. You are right in that if your going to build a factory car the items will be expensive and some will be hard to find....maybe many.
My car had no additional parts to go with it but then I did not need any and the track version was in it's future.
Maybe if you buy this car you can look for a rusty but complete car to supply the other parts you need......
I guess it depends on what your planning on building????