Polishing pads - name, mfgr...?

Hello,

I had seen some polishing pads, useful for buffing the edges of fused glass &
so on. The oduct is like a sponge, as the diamond-embedde dpolishing pad on
one side.

Can anyone tell me what they are called, or who makes them? I'm trying to
find out where to buy them, but it's dificult because I lack the search info
I need.

Thanks!

- Kris