Internally Wiring the T-Bars on my Club Style Dyna 

Here are some options I found on Amazon. I didn't see those at the time I purchased the Drag Specialties version. The way the signals mount is bike specific depending on your clutch perch. Make sure to check you are getting the right type for your application.
amzn.to/3mQJfZe - Dyna
amzn.to/3mTvEAC - 2004 + Sportster
The version I used are by Drag Specialties. Type what you see below into the search bar and they should come up from several different retailers.
Drag Specialties Black LED Handlebar Marker Lights with Smoke Lens