MPX-16 census

Does anybody else on the list have an MPX-16 system? I recently acquired one from a list member and am wondering how many of these systems still exist. I have a large (relatively) collection of diskettes with mine. The MPX-16, for those not familiar with it, was published as a project in Steve Ciarcia's 'Circuit Cellar' column in Byte magazine. It was a three part 'construction' article and the machine was sold by MicroMint for a time. What I've heard is that about 500 machines in total were produced. It's an early 'IBM Compatible' in that they designed it to be similar to the PC, but only to a certain degree. It uses a serial console rather than keyboard/display adapter, and it runs CP/M-86 and supposedly MS-DOS though I don't have DOS diskettes for mine. It has ISA slots and a similar architecture to the IBM-PC, coming out of that early era before there were PC clones from the likes of Compaq. I'm curious of how many other MPX-16 systems have survived to today. There isn't a lot about it online. I can share what information I have, as I have manuals and docs with my system. I'm interested in hearing from other people with this machine. Scott