I just did mine this past weekend when I changed my bars. I think retail is something like $134.95. I got mine from Zanotti's for $105.94.

 

The current price for the switch housing is $123.95. I will pay half that price and it will look just as good if not better.

 

In the manual there is a note that if you don't use the spacer behind the brake lever it says that the plunger from the master cylinder could be damaged

 

just in case someone with handlebar turn signals reads this thread, you will have to either cut or un-solder and re-solder the turn signal wires since they go through holes in the housing. The non-handlebar mounted lights, like on the UC, RK and others, are much easier to do since you don't have to cut any wires.

On both however, patience is the word!! I've done it twice, on my WG and my UC. A pain, but does look real good when you get done.

I bought my covers on E-Bay for around $60.