MoeDuke

Hi, I'm looking for a birthday present for my brother. We grew up watching the Dukes and although I like everything Duke, he is a bigger fan than I. I've already done some searching but have come up with nothing. What I'm looking for is any Dukes audio books on CD. If anyone can help me out with a link, thanks. I also have a question. Was there a book that originated before that started it all, or did it just start in TV? And if there is an origin book, especially a CD audio version that would be cool if someone could link me to that info. Thanks again.