I recently bought a used Bach TR300. It appears to have been played quite a bit and taken care of well. It's got a couple of small inconsequential dings but it plays well. The first thing I did once I cleaned it was order a set of felts and corks and replaced them. The action's a lot quieter now and it doesn't leak onto my socks any longer while I'm playing. However, I've found that if I'm playing a fairly fast line that the finger buttons bottom out. Does anyone have a line on a good online supplier for felts I can put in the underside of the finger buttons? I'd rather not buy a whole tune-up kit again if I can avoid it.