If you need another opinion, I "third" the notion. Willys-Overland in Toledo was a huge Jeep parts dealer, but he had to get out of the pieces and parts business just as I was starting on the '48 Project. I bought a bunch of stuff from him and I'm not sure whatever happened to all the warehouses and yards of stuff he had collected.

BMorgil and I looked his display over closely. If I remember correctly, he has put together set of gauge parts and chassis jigs that he uses to move holes to the right places.

You will pay for his services, but things will come a lot closer to fitting if you get them from him.