Leeneia - so far I haven't actually put my hot little hands on any of the cartographic paper or similar, but hope to score this morning when a shop that deals in Scrapbook making opens for the week. I have called an office supply place and they can order it, but I'm the impatient type - don't want to wait a week.

Nina, thanks if you call them. I'm going to pursue the mylar film for now. The more I think about it, the less concerned I am with the vintage/value aspect.