Nobody has two 8-19.5's laying around ?
Mike
Have you tried a wanted add in the swap meet section? one there may get more traffic.
I probably have a pair of Goodyear 8-19.5 tires laying around, but they are normal straight tread and I don't think they will help you.
What I don't understand is why you want old, or even really old, used tires for "show"?
Assuming you have roadworthy tires you run everyday, which sounds like you do, then I'd just run them everyday; shows included.
Grigg