The book is still available from Mr Bergrun's site as far as I can tell.
http://www.ringmakersofsaturn.com/
There is also a DVD of him doing a 2 hour presentation at a conference, I came across the other night. It is available for sale from a website that slips my mind at this time. I will look for that link and get back to you with it.
The rebuttal article is not accusing him of hoaxing as such, but it put's up some interesting suggestions as to why he may have been supplied with doctored images.