I think there is still a Chinese 7.50x20 highway tread available, Powerking? Mud tread at last check was only available in the 8.25x20 size.
Newer drop center wheels closest size is the 19.5, finding a tall enough tire to make it look right that is also narrow enough is still a challenge.
My tires aren't bad tread wise and weathering is tolerable though they are old close to 20 years now. I'm still on the widowmaker rims too. I'll replace the tires with similar when the time comes, its not worth a rim change to me.
