Thanks for all your kind responses. I'll give Exploration Products another try, although I had considered buying a standard glass vial (commonly available for perfumes on the internet) and using a thin sheet of teflon to make a gasket (about 11 bucks for a sheet of 1/16" sheet stock, 12X12). I just didn't want to buy enough to make a bunch of vials when I only needed a couple.
So again, thanks for your help. I figured if anyone would know, it would be this group.
Kev