As I rediscover my AFX racing sets and cars after 25 years, I continue to find new issues. The tires on the cars are literally disintegrating as i touch them! Expected after so long, but still one more thing to do. Question: Is there a "preferred" website or dealer that you guys use to purchase tires etc.? I will need to buy them in bulk (over 75 cars) so price and quality are important. Thanks for any leads!