Scratch that, I found some Peel N Seal. FYI, Ford Wholesale in Oakland (510-562-9080) has the following rolls of Peel N Seal (aka FatMat):
6" x 50' (25ft^2) for $34
9" x 50' (37.5ft^2) for $50
1' x 50' (50ft^2) for $66.95
Also, for those in the San Jose / Fremont Area. Pacific Supply in...