Hey there superman,
I did some searching on the Phoenix craigslist for you. I didnt find any lower-cost bargains, but I found your wanted ad. Posting that ad was a really good Idea
The 56 is the only year of this body style that has the wrap around windshield, but the 53, 54 and 55 all basically look the same,
(except for a flat windshield, slightly different grills and different fuel tank filler-neck locations). So I was just thinking If you'd consider buying a 55, you might as well be searching for a good deal on a 53 & 54 too...
I've also seen some F100's that have the exact same body-style as a 56, but Ford sold/registered them as a 1957 model-year... (kinda weird) I guess Ford was just using up all their 56 bodies before changing over to the newer/more-square body style most 57' F100's had.
I live in Phoenix and have a 56 F100. I'll try to help you find one to fix up.
Here's a pic of my 56:
(but sorry, its not for sale