You may want to give this guy a shot, a few years back I purchased from him an intake maniforld switch over lever metal plate for an M272 and the product was top notch; The transaction went smoothly.
He also has a few other iteresting things up on his website.
Regards,
BENZ W124 E300 E420 E320CDI Heater control Valve Repair Kit-04 - Hong Mei Trading Co., Ltd