Check the old XJ's (Cherokee) and possibly the early ZJ (Grand Cherokee).
When I bought my XJ/cherokee, part of the reason that I picked that one is it had the full size spare. Most had a smaller one. I believe it was the only one I saw with a full size spare when I was looking.
Check out the ones in the early to mid 90's era....
Here's a link to a database listing salvage yards across the country that you can search for specific parts: