One of the better more reputable companies dealing in electromedicine devices is Sota Instruments, primarily Bob Beck stuff.
Ken Adachi at Educate Yourself makes very good, dependable devices as well.
Perhaps the two best books on the market describing bioenergy medicine from a strictly scientific perspective, indeed making all the right connections between numerous researchers in the 'hard' sciences, are both written by James Oschman, one called Energy Science. the Scientific basis, and the other Energy Medicine in Therapeutics and Human Performance.
They are expensive books but well worth the cost, especially if you have a client who 'wants the facts on the ground.'
James' site is here:
http://www.energyresearch.bizland.com/
He has a number of articles archived at the Journal of Bodywork and MOvement Therapies, as for example:
www.harcourt-international.com/ journals/suppfile/flat/JBMT-Oschman.pdf
As for Patrick Flanagan, while I don't have any personal experience with any of his products, I would stay clear of the guy.
He is a spook research scientist, for whatever that's worth.
What was it he first invented at the age of 16 or so, back in the '60s? A neurophone or something-- a device to enables you to 'hear' a 'voice' projected inside you cranium, bypassing your auditory conduit altogether.
For the hearing impaired. It was going to open up the world of sound to the deaf.
Yeah, right.