Thought about the same a few weeks back and started looking. Can't get past the pair of 3" cans mounted to the bars. Even behind the batwing, just doesn't look right.
For $450, I'll stick with the MP3 player.
Hogtunes has a unit for the Memphis batwing, but you wouldn't be able to see the speedo with it mounted on a Vic.
'09 Kingpin 8Ball
'06 HD Road King
'06 Vulcan 900 Classic