While you all continue to wait for the tech tip to be finished try this accuride catalog:
http://www.accuridewheels.com/completeversion.pdf

It has what wheels are available new, and I believe 6 lug 20" or 22.5" are available.

You must first know the number of stud holes, bolt circle diameter, the center hole diameter, and if hub piloted or stud piloted. There are many choices of sizes, you need to know for sure what you have to start with.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-