After years of "making do" with a chunk of low density foam (like furniture stuffing) shoved under the bridge of my '62 Precision Bass re-issue, I finally decided this week to try and do the job properly and fit the bridge cover that came with it. The problem is, there's no foam string mute attached to this. My question is: Do any of you have any suggestions as to where I could buy the genuine article (if anyone manufactures one), or could anyone suggest where I might find some suitable material of the right density to make one up? The foam I'm currently using is too soft, I think and causes a very uneven level of muting if it moves around. As I've never had an original bridge cover, I don't really know how dense the foam's supposed to be (as dense as mouse mat foam, for instance?). All suggestions welcomed.