CGC assembly for MM was originally done at the Stern factory. I have a first run MM remake that has an Entropy coin door.

CGC then brought assembly for AFM in-house. Presumably they also brought assembly for MM in-house. I don't have an AFM remake but I have seen one and it has a Happ coin door.

Happ coin doors are cheaper than Entropy coin doors. If you want your MM remake to look more like a Bally/Williams you can purchase an Entropy coin door and bridge the wiring between the two door styles (unless they are already directly plug-and-play compatible).

If you want to do this and are unsure I am local to you so send me a PM. I'd be glad to help you.