Anyone seen any ?

Got a mate with a Streetbob who'd like to do this.

Rocket... saw this on a Bob advertised for sale last year. They never responded on where the tail light/plate came from.

I think zodiac make some like that Ho

there are some similar that actually flush mount into the guard, they look pretty trick.

there was a bike in a recent heavy duty mag that had one, i'll have a look for it when i get a minute

HD Mag, issue 94, page 94 arlen ness have a look here

http://shop.arlenness.com/category.asp?SID=1&Category_ID=59&Page=2

this one doesn't say that it's reccessed but looks the same.