http://www.customdynamics.com/motorcycle_led_bulbs.htm#Incandescent_Bulbs Go to the top of the page.
I had the electrical connections kit and it was good for the time they were the only ones that made anything led and it was kinda plug and play but the link above are basically the same as the electrical connections except their brighter bigger and just look better. They have to have the sides shaved a bit because they are made on a flat piece of mica. Then you glue them into the lens. You can call them and have them made with a regular bulb base but you will still have to wire in the running lights and the brake lights not hard to do because you can run the wires right to the tail light. This does have to be done with the electrical connection lights too. I have clear lens also because the leds are colored and shine through better with a clear lens.
http://clearalternatives.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=CA&Category_Code=CRUISERAlmost forgot may need to add a load because the leds I think don't consume enough juice to keep the signals flashing. I have the Kisan signal minder and it works perfectly with leds so no load is required.