I found a pair of Used 22.5 Dayton wheels and tires both for my 70's chevy bus, for cheaper than the price of new 20.5 tires only.
These were from a commercial vehicle tire company in Denver, GCR Tire. I called the 3 commercial vehicle tire shops, and this one had used stuff in the right size for the right price. $1000 for both front wheels and tires, all used, installed.
Attached are pictures of #TheBarbieDreambus old front tire with black wheels, and new (used, but new to me) tire with white wheel, same old black Dayton center. And bus cat.