Sin State Cycles has them cheap in every size starting at 4" to 9" but I don't believe they are preformed. It would be hard to beat Cee Baileys quality.
www.fastaire.com has 6 and 8 inchers in stock, in sunglass gray. Darker than smoke, but not solid (read: cant see thru) black. 32 bux or so delivered, and took 3 days to get it