Have you found one?
I was looking to do the same swap in my truck and only ran across 1 for sale. Cost was more than what I paid for the truck and a 200+ mile trip to pick it up. (and no guarantee). Junkyards up here would assume what you have is toast and offer you whatever scrap value is. (maybe) They want parts gone and $ coming in.
For me It was much more cost-effective to just get a re-built turbo 350.