You can buy a cheap aftermarket (Dormann)automotive choke control and salvage the wire out of that if you can't track an original down.
"Not all who are laundering are washed" say Bill & Heidi
'78 Excella 500,"The Silver Pullit". vacuum over hydraulic disc brakes, center bath, rear twin. '67 Travelall 1200 B 4X4 WBCCI 3737