i think you are talking about the bar end ones?
Anyone say bar end ones? My all time favorites are vintage BMW signals. Here's a set on my H-D. They are wired as running/turn signal/brake lights; red in the back, amber in the front.
When I get the time and money to figure out how to extend my S4RS bars to mount the Rizoma mirrors, AND open up the I.D. of the bars for clearance for the signals, I'll mount a set on my Monster.