Way old thread, I know, but the topic is relevant and this was the top google hit for "Operation Wolf Mame Cabinet Conversion", so I figured I'd see if others resorted to what I did:
1) Gut the Op Wolf Cab, and install a PC with external monitor/Mame (have to flip the image due to the mirror)
2) Buy an AimTrak
3) design and 3D print a mount for the end of the Op Wolf gun in which you can install the AimTrak.
You have to run the AimTrak USB cable through the gun handle which is a little tricky, and we couldn't get the recoil to work, but once you get the lighting right in the room, it works pretty darn well.
If anyone is interested, I can take some pics and/or video.