The name of the book I purchased the wallpaper was from Garden House...
I had the same thing happen to me a few years ago. I called all the stores in town to see if they had any in stock, no luck. Then I hunted down hardware / wallpaper stores on the Internet (not the big ones like American Blinds Wallpaper) and emailed them. I got responses from almost all of them, and two of them had a couple of rolls in stock. I wasn't able to get matching lots, but the difference wasn't that big of a deal -- I just changed to a new roll at a corner and it's not very noticeable. When you email them, give them all the info you have -- manufacturer, book page number, pattern number, describe it if you can (purple floral, whatever), and if you happen to have a small picture, attach it to the email. It can't hurt! Also, check eBay. Good luck!
if you know the company that made the paper give them a call. often times these companies have leftover paper from discontinued patterns that they are happy to sell. there is also several wall paper and blind outlets that may be able to help
