I bought one through Aircraft Spruce and it works very well. Much less expensive than the Whelen. I had to fab a small fiberglass mount for the irregular surface but it works well. It certainly makes you more visible, especially in rough water.

www.bluewolfinc.com
They do aviation , custom & I got ya hookup on the underwater side of things! Email or call Greg, he's the man.
Tell him mike sent ya please.
MD

Will do Mike, thanks, I'm looking at a few more custom pieces, Aveo had exactly what I wanted. Wasn't cheap but they're the only ones with the particular item.