THE E-MAIL ADDRESS IS http://www.puch-wieser.at/ PART NO. IS-253.5317.2 COST OF SWITCH IS 95 euros.THIS COMPANY SELL MOST OF THE PARTS FOR STYER DAIMLER PUCH MOTORCYCLES.I USE TO OWN A 1964 250 SGS,THERE BUILT LIKE A TANK AND I LOVED THE DARNED THING.VERY RELIABLE IF THERE LOOKED AFTER....GOOD LUCK,HOPE YOU GET SWITCH WITHOUT TOO MUCH TROUBLE...DAVE EVANS,BOLTON,UNITED KINGDOM.