I got mine from www.kutterharleyonline.com Free shipping too! It might take them a while to get them. I think mine were on order for about a month and a half.
I have them on my nightster 09 and they work like a charm ! just make sure u do the wiring correctly and it won't affect anything if you remove the original signals !
I'm not sure why you'd want to remove the stock signals and just use these. I want to be seen and the more bright **** I've got on my bike the better chance I feel I have. All I need now is a loud *** air horn.