Quoted from Coyote:
Honestly, that almost looks like a stnadard blank door, with some custom work done to it.
I, too, would be curious if this was a factory (either coin door manufacturer, or WMS) option like that.
Indeed, that is a blank door ("lower" door for collections,m on some arcade/redemption machines that have a separate door above it with the mechs) that someone chopped up to add whatever mech they decided to use. The door itself appears to be a CoinCo but the mech.. who knows