Paul,
They're available new, but only in black. If you need another color, you have to either re-dye the vinyl insert or replace it by dismantling it. (I recommend the former.)
Personally, I wouldn't look for a used one if your interior is as nice as I think it is. Most used examples aren't too pretty, not to mention sooty and ash-covered for some odd reason....
Douglas Kim
New York
USA