I've been following these instruments for a few months now....not much known about them.
There were 100 made, distributed through dealerships. Some markings exist in the neck pocket.
I have one of the 'newer' black guitars with the pointed headstock - Indonesian build with EMGs and Buzz F. tuning. Neck-through construction, while all HM-80s were bolt-on neck construction.
If anyone has a white one with black binding, I am VERY interested in purchasing....
I'd also be interested in hearing what happened to the Robert Palmer guitar.