Sorry for the thread necromancy, but I've been researching replacing the elastomer on my Klein Reve V and I contacted this place, https://www.suspensionforkparts.net/eshop/, and they will custom make one for me provided I provide its dimensions. I've yet to give it a go, but now that the rains are here I'll get that part off and get it measured. BTW, I'm still riding that bike, absolutely love its ride...no problems with it though that elastomer is definitely on its way out. Had it at a local shop a few months ago and they didn't have anything bad to say about it. BTW, I am the original owner and the frame came with a lifetime warranty (though what's that worth now).