Cupholders for these seem pretty high. The Cheapest I have seen is like $70 plus shipping and handling. There are ones on Ebay from time to time that go for higher than this. I'll have to look around and see if I can find you a link. I was going to replace mine, but decided against it, as it isn't worth $70 to me. Mine has none of the little rubber tab jammies, and the one "rest" is gone but it still holds cups pretty good. Styrofoam cups seem to get stuck in it though.

As far as the filter, have you looked locally?