I've just reproduced the rubber engine mount pads that sit below the steel engine mount plate straps for the 1963 and up model ski-doos. These rubber pad mounts are available for the the 1963 to 1968 models which had a single diameter bolt hole through them, and also the 1969-up version which had dual diameter or stepped hole through them to accept the locking nut which held the motor mount bolt in place on the 69-up model Ski-Doo's. Both these Spaulding Vintage mount versions have the fiber reinfocing material bonded to one side just like the original mounts.