I am currently restoring a 1980 Ford F-100 with my son. The problem I have is that the cab rusted above the doors along the rain guards, thus rusting the whole cab frame. I am looking for anyone that knows where I can get a cab for this year model. We have already purchased new fenders, the hood, tailgate, and so forth. We just need the cab, it does not even have to have the doors or windows.
Any help would be greatly appreciated.  

You could check out several places to find a cab. One place is our sell your parts section, another is eBay or Craigslist. For a vendor I would check out Bobs F100's or LMC. I hope some of this helped.