CEV 206 handlebar switch as found on 1977-78 Ducati bevel drive twins as well as other models / brands. This is a new old stock item. It is the front face with electrical etc as you clearly can see. The part that slips over the bars is not available..... I found a small stash of these things all brand new condition. The Molex connectors on these may or may not be exactly what you need for plug and play for your application. You are buying a super rare CEV206 switch exactly what you see in the photos..
Possibly needing to modify the wire connectors to plug into your existing harness is a small price to pay as I have *never* seen these switches for sale anywhere in the past....
These also came on some Ducati GTS models along with a smathering of various Euro bikes in the mid 70s ie Moto Morini...