Closest one to you is
1993
Transmission
Ford Truck F250 MT, ZF, 4X4, 8-445 (7.3L, dsl) H09102 $1000 Hawn FreeWay Auto Salvage USA-TX(Dallas) 866-969-9971 / 972-286-9971
For the clutch master call
Jim's Auto Salvage, Inc. USA-OK(Woodward) E-mail 1-800-725-8733 - It says its still on vehicle so you should be able to snag everything you need.
As far as clutch and flywheel go I would go with the Single mass conversion its around 600$ around the same cost as a new dual mass flywheel. plus its alot better for towing in my opinion.
What are you going to be using it for mostly? towing? highway cruising? Do you really need an overdrive?