I'm in Mountain View, CA. I looked up my info. on it. I got if from http://www.h-oproducts.com
The part numbers are T-C7.045AA-Q2-CUST for Sup-R-Mount Tape, Gray, 45 mils (.045") Thick x Custom Width x 108' Roll and T-C7.060AA-Q2-CUST Sup-R-Mount Tape, Gray, 60 mils (.060") Thick x Custom Width x 108' Roll. Thick price would be $40 a roll and $20 for thin plus shipping.