Help! Does anyone know what that foam that you get in microphone and camera cases is called. You can cut shapes out of it to fit items snugly in a case. What is it? Where can I buy it? It is a bit more like the stuff you scour pans with rather than the stuff you sit on. I am tired of my beloved whistles rattling around in an old cloth bag and I have a nice little leather case that belonged to my grandmother. I ask camera freaks and sound men at gigs who all have cases with neat holes for lenses or microphones. They all look blank and say " Yeah I've always wondered what that stuff is." I've got my Dremel all ready to go to work but I can find the foam. Help anyone?