There is a guy on RDP that has an awesome Excursion but it has the 6.0. However it has all the Bulletproof mods to make it, well umm Bulletproof. Lifted, special air ride suspension etc. all kinds of cool stuff. Decent price for what you get. But yeah the 7.3 are a bit harder to come by. I know I still looking, but I think my requirements have changed enough that I may go with a 7.3 truck.
Why the cloth seat? I hate 'em, they show wear so fast and when they get dirty they don't clean up very well.