Columbia Mignon

I recently found a floor model Columbia Mignon. I haven't seen it in person yet, but saw some pics. It appears to be complete, except for the lower door. I have emailed a dozen or more collectors and only one said he had ever seen one. Another collector friend has a complete machine that I could use as a pattern for the door, but just in case anyone happens to have a lower door for sale, that would be perfect. Since no one seems to know anything about this machine, does anyone here have any information. Scarcity, collector value, etc.? What is the story/history of this machine? Thanks for any help.