If you really want one, I think I've got a pair of '06 books and could send one to you. Stan's got it right, too, in that you can use an '05 and find the '06 rules changes on the site.
If you got my '06 book you'd have to explain to whomever sees the book why you've got one that says "Seldom Seen Slim" all over it.
I know where one of 'em is, I'd have to dig up the other. let me know if I should start digging. . .