howdy, I've got a 41 WC-12 and I recently did something similar. If the bolt patterns are the same there are not many options unfortunately. The bolt pattern is a Budd 5 lug pattern, the measurement is 5 on 6 and 7/8. If I could post pictures I could give you a diagram but I can't figure it out.
I was able to have a company in Wichita Kansas make a set of wheels. This company, trial worthy fab, recenters modern military wheels. Not a cheap option, and not period correct but an option that I am very happy with.
Look at vintage power wagon they offer tubeless wheels that are period correct but they are really expensive. 425 dollars a wheel I think.
Also look at wheelsnowinc.com and Stockton wheels they may have something.
Wheelsnowinc.com, I think, has a lot of obsolete wheels.
