When I fitted my LED spots to my Twin Cam, I used one of these switches from ebay, a good enough match to OEM
http://www.ebay.co.uk/itm/black-mot...pt=UK_Motorcycle_Parts_13&hash=item1c38b47132
http://www.ebay.co.uk/itm/black-mot...pt=UK_Motorcycle_Parts_13&hash=item1c38b47132