Ok, I've had this sitting around for way too long. It looks like I am never going to get to it, so I might as well sell it. This is a 50" Medium Res RGB monitor from a Sega Virtua Cop game. You can see from the pics that it works for MAME and that it needs to be tweaked. (Sorry they are dark, but I had a cheap camera.)
$100 and you pick it up in Lewisville, TX (near DFW) or arrange for shipping. I am not hauling it anywhere again.

Note: I was not using a JPAC to run MAME on this monitor.