The book includes 2 sets of plans, both which can be modified to work with any size TV, just make your width whatever you need it to be, and make sure the depth will fit, if not adjust youe measurements for that as well.
As for where to buy the book, I got mine at the local Barnes & Nobal.......I know Amazon has it, as for Wal-Mart I think I may have seen it there but not sure......try the book store at you local mall