The rubber tires from the Cross F1 will fit the 103's. I'm not sure but I think the Tamiya rubber tires are still available here and there. I know they still use them in England and Japan and have been for several years. Go to the formula1-rc.com site and click links for the Yateley school club. Rubber is all they use there. Drp them a line and see how to get them. The 1/12th foams will also fit the F201 wheels but grind the inside ridges on the wheels first. The stock foam tires for the 103's are still available and also fit the 201's. Wings? Try Cross again along with champrc.com and d-drivesports.com. They sell the 103 wings and bodies (very cool bodies) that come from chevron models.com. rcindycars.com still has 103 wings in stock and there is another car that uses them. I'll find what I can on that. Go get'em! Keep me informed on how the races are going there.