Hi
Best bet is to go to bike rally / race meet / Matlock on Sunday and check the bikes on display. I use a Z1 Kawasaki switch from the 70s but it's probably classed as a very expensive classic part now. There are lots to choose from, it's down to personal choice more than anything else.
Leaving indicators on can be a real problem, especially with full face lids that stop you seeing the warning lights. Self cancelling is good, I had one on a BMW a few years ago, but sometimes it would cancel too soon, and gave me the odd problem. There's always the beeper, but watch out for blind people who think it's the Pelican Crossing signal to cross.
Howard