I remember getting a set for my bike from the catalog of a business called Auto World, I think it was located in Scranton, PA.
Quite an outift, they sold model cars, HO slot cars and also real race car stuff. The wheelie bars needed to have an option that you could purchase a box of Band-Aid's with them too....they did not work well in gravel, specially if there were any fences nearby that had barb wire...
