This Tech tip
http://www.stovebolt.com/techtips/wheels/

Although there is a lot of good info in it, it does not cover your 6 lug options, in the future it will.

Open the Tech Tip, then click on the link for the Accuride Wheel Catalog.
The wheels you are looking for should be the ones on page 18, part number 28157, check the bolt pattern to be sure.
These 22.5" wheels can be bought new from most any big truck tire shop.

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-