Michael,
Try the U.S. Post Office. I believe they sell international return mail reciepts of some sort for different countries. They aren't stamps, but they are precalculated to cover return postage.
Pam Richards
Information Specialist
Health Science Library
St. Michael's Hospital
30 Bond St.
Toronto, ON
M5B 1W8
416-360-4000 x2924
416-864-5296
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From: Michael Schott <[log in to unmask]>
Subject: Canadian Postage
Hi! This is in no way connected with medical libraries, but I am hoping a Canadian out there will take pity on me and give me a hand. I need enough Canadian postage to get a letter from Montreal, Canada back to the United States. I am mailing something to Canada and want to include the return postage. I would be happy to pay someone a few dollars for this service. E-mail me at [log in to unmask] if you can help.