The 58/60 was built more for performance potential and the later 61/66 for pulling the heavy LINCOLN.
E-BAY has a lot if you watch it closely. If you can find a donor car, you can get all the odds and ends you need. Also keep an eye on
http://www.michiganlcoc.org/cgi-bin/ultimatebb.cgi as there are a lot of sales and trading there.
The only other option is if you cannot find one at a salvage yard is to go to a larger salvage yard and have them look for one. They will give you a price for locating and having it shipped to them.
GOOD LUCK!
