Steve:, 2 names of the product are Anaglypta and Lincrusta. I believe that the major distributor in the country is in New York or Philly but I don't remember the name. Your favorite search engine should find a lot more for you. I did a quick search and didn't see the name of the distributor but they are not supposed to sell direct. Most independent wallpaper stores can get it.
One thing that you might want to know is that patterns with a heavily raised texture can be easily damaged by people or things rubbing up against them. Consider chair rails or using it as borders.