oh...
http://www.hemmings.com
Check there too, on US TV, they are advertised quite a bit on Car Shows such as a show called
MyClassicCar
Also might wanna do searches for forums that deal with GM cars of that era and check their classified sections and make friends with the locals...might be able to find you a good condtion Visa Cruiser so you'll just have to buy it, ship it, and drive it in style