I've seen the stuff at the Advance in Clemson, so I'm 99.9% certain you should be able to find the same thing down there.

I'm thinking it may be the same thing that a friend of mine used to fill in the gaps of his rubber engine and transmission mounts to make a ghetto polyurethane mount. I'll have to check on that though, I only did the labor to get his ZC in the car, he did the stuff with the mounts.