I have dealt with the Hitec/Multiplex guys and they are a bit confused as far as the Multiplex radios go.
The radio is far superior to the Hitec and they seem to consider it the bas--rd child.
The service was much better when Multiplex had their own outlet and was not in cahoots with Hitec.
That being said the best thing to do is keep checking eBay for a radio to come up.
I will PM you the address of the guy that converted mine.
Shoot him an email and see if he still does it. BD.