I got one on mine and it looks factory installed and you hardly see it. I have had if for a year and absolutely love it.
I talked to the guy that makes them and he assured me if I did not like it he would refund my money. In fact he sent it to me the same day I sent him personal check at his request. He told me in the many years he has done business, he has rarely been burned by a biker.
Might be pricey but you get what you pay for.
http://www.madcorider.com/cam-lock_honda_cruisers.html