I have this mic.

http://img2.musiciansfriend.com/dbase/pics/products/27/271072.jpg

What should I do?

Call them and order another. Or go to some of the on-line music stores (or the manufacuturers) and order another.

The foam you lost doesn't last forever anyway.

You might even find one at Radio Shack.

Thanks dude. I'll bet radioshack will have something for it.