My BMW dealer is also the only Yamaha dealer and since I don't actually have a Yamaha, they wouldn't reverse part look-up, at all. I even gave them the part number.
The Kawasaki dealer said he would look for it and probably had some inventory but strongly suggested that their shims were just slightly smaller in diameter enough that I might not be a happy camper. He reasoned that they have sold them for Yamaha guys that complained they "stuck" in the bucket causing, well, bad things.
Facing the shim off, drinking beer and crying with my buddies that the Jets didn't come close to being play-off hopefuls was a good alternative. If I was a Leafs fan, all I can say is with all the beer in the city and successful experimenting with a shim, I'd still be drinking and crying.