pinion shims

Anyone here have a source for obtaining just shims for setting up pinion depth ? I would like to get locally, but haven't had any luck only through mail order and I'm no longer comfortable giving info over the net, Tried the various chain stores but no one stocks or can get a shim kit, only the complete ring and pinion install kits, which I don't need or want to spend the money on that kit for only what I need. Diff in question is a 741 case 8/34, thanks..

order from Summit Racing --- RAT - 1109 -- $13.00 -- I believe 8.2 10 bolt GM will work also.