i put the SW-Motech ones that are very similar to they ebay ones you are looking at but they are longer. they don't actually fit so i don't recommend them.
http://www.twistedthrottle.com/trade...view/2518/704/
if you have the tools you can pull the inner fairing away just enough to get them installed. i used a really skinny 1/4 inch ratchet and slipped it in.