Has anyone used these, does gsa carry them.

I have one 9" round. I LOVE it! You know that nasty cake "film" from the reg pans when u use flour and crico (sometimes it sticks to the pan too and you can scrape it off with your finger and eat it hope you know what I'm talking about)

Anyway these pans are made of metal, but they look like they have flat pebbles on the bottom.

So anyone seen them? Know where you can get them?