Use a homemade one, I've got a homemade one and used it for the first time yesterday and it seems fine, theres a youtube video on it you should take a look at, if the hands are your problem anyway.
yeah, the homemade one works fine and costs about $30 for all of the supplies. the only downside is you tend to get zapped more & have to replace batteries. apparently you can use a dc converter but that scares me a bit.
Not sure if this is what you are looking for but I am selling a Drionic hand/foot machine. It was purchased new in 2005 for $150 and used twice. Would like to sell for $100 (including shipping). you can email me at [email protected] if interested.