Another option would be to cut the used AKA foams out of a set of old tires and mount the used foams in a new set. The foams will be slightly softer.
I've got foams that have been in atleast 5 sets of tires.
True, AKA's are essentially the best tire manufacturer out there, I do wish they would make 2wd tires as well not just 1/8 scale