[B.K.]

Try ENCO. They have feeler guages and shim stock that's supplied for the machining and metalworking industry. Just a suggestion, but buy the set with the approx. 30 degree angle bent on them, makes it easier to get under the buckets. Here's a link to the pages with feeler guages.

http://www.use-enco.com/CGI/INPDFF?PMPAGE=392&PMCTLG=00