Wanted 1968 Dodge dart wiper motor arm

Hi all trying to get my 1968 Dodge Dart GTS passed roadworthy and am get frustrated trying to find a wiper motor arm....the little short one attached to the motor shaft. I need the arm, bush, clip and nut to hold it onto the motor shaft. It needs to be for variable speed motor not the 2 speed one. anyone got one ?
also need a number plate light for same car

Cheers