I have a stealth MAME Journey, Tron, Robotron, Crystal Castles, and Star Wars. Most were purchased as empty or converted cabinets. I restored them to original cosmetic condition and used MAME as a platform to run the original game, plus whatever other games that used the same control scheme.
The only truly unmodified control panel would be the Star Wars since I am using a RAM Controls SW Yoke to USB adapter, which is made to plug into the original SW yoke connector.