How about some 245/75R22.5 tires?
These are all the Goodyear tires in that size.
http://www.goodyear.com/cfmx/web/truck/search.cfm
37", 37.1" or 37.6" depending on the tread style, and about 9.5" wide.

Or some G670 in 255/70R22.5 at 36.4".
If you can fit another 3/4" radius on your current tires these may fit? Do you have more than 3/4" between tire and fenders during all suspension travel?
But they are about 10" wide, need to account for that too.
Also note that if they were bald they would be 1" shorter yet, and bald tires are cheaper tires wink

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-