I can second Jamestown, have used them for locally difficult to find things. I used to recommend Painter's Supply on Santa Fe for 3M but they have just about gotten completely out of stocking 3M and so I've gone to mail order out of sloth. There are several marine supplies around town plus Plasticare and ePlastic for just about everything in epoxy, resins and the like.
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein