I may be missing something here, but 1/5 cut microfiche
guide cards are nothing but 4x6 guide cards, aren't they?  All
of the major office supply houses have them for use with file
cards.  I buy them to file my library postcards (and, btw, if
you have a postcard of your library you could send to me, it
would be wonderful and appreciated).  And, though I haven't
looked lately, the catalogs of the archival supply houses used
to have them in genuine acidfree stock at a considerably
higher price.  Since my postcards are all in protective mylar
sleeves, I don't worry about the possibility of acid in the office
supply store guide cards.  So, this may give you a few more
leads.

dan

Dan Lester, Network Information Coordinator
Boise State University Library, Boise, Idaho, 83725 USA
voice: 208-385-1235   fax:  208-385-1394
dlester@bsu.idbsu.edu     OR    alileste@idbsu.idbsu.edu
Cyclops' Internet Toolbox:    http://cyclops.idbsu.edu
"How can one fool make another wise?"   Kansas, 1979.