Doesn't seem that hard to find or expensive $5 /lb
http://cgi.ebay.com/ebaymotors/R-12-REFRIGERANT-50lb-VIRGIN-NIB-SEALED-TANK-_W0QQcmdZViewItemQQitemZ140439434112QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
Cheers Dan

__________________
It's always something simple
91 300D 603.960 (from japan) 194K
92 Toyota Diesel Landcruiser HDJ81-t 116K
02 Golf TDI new head courtesy of PO
87 300D
97 BMW 525 TDS Wagon 5spd
bunch of Onan and other diesel generators