Try Rickson Truck wheels.
When I visited some years ago they were almost setup to machine and assemble wheels.
http://www.ricksontruckwheels.com/wheels.php

Grigg

Last edited by Grigg; 10/03/2016 3:15 PM. Reason: add link
•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-