Know-How Exchange : Advertising/PR

Later this year, we will be exhibiting at a tradeshow in Las Vegas and I am contemplating the idea of a pre-show mailing of a Vegas Map would our logo and short message on it (one of our products has to do with mapping and it would be an interesting link).

Some years ago, I remember seeing such mini promotional maps available for many cities where logo/message could be added.

I can't remember the name of the company offering it and can't find it via a web search. Any suggestion would be appreciated!

Regards