There was a post on rpg.net about a . That would be a fun addition to this idea. He said that the resolution was a bit poor but if you're doing your home town, you probably don't need names on things. In this process you'll probably be renaming things on the fly anyway.
If you did want a high res map, the guy who does Enderra printed some really nice at a photo store. It's smaller than the photo size but still quite large.
Just thought a really large format map would be a lot of fun for this kind of setting. And if you went with the vinyl, you could use it as a tablecloth to prevent any damage to your kitchen table from spilled drinks etc.