I don't and I've never heard of one either. Doesn't mean they're not around though. I know lots of riders keep their old license plates and hang them either in the garage or in the basement. Might be an alternative idea for you...
I was wondering about a scale model too the other day, as I like to build them, but I was considering using it as a test bed for painting schemes..before I did full scale. The closest I've found so far is the Yamaha Virago XV1000 at 1/12th scale. Here's a link to it:
There was a company that made small models, pre-assembled ala Matchbox, that had a Vulcan 750. There was a group buy on what someone had left of them awhile back, so it's possible to find one on Ebay or talk one of the owners of a model out of it.
The one on ebay is a 87ish VN1500. They looked very much like the 750's back then.
Jardine cross over exaust
Kyriakin grips and foot pegs
Modified seat and backrest
Crash bar with Kyriakin pegs and extensions
Kumho 758 165/80-15 CT rear Dunlop 404 110/90-19 front
Coastered and air/fuel screws at 2.5 turns Spline lube
93' VN750 getting TLC
Decals and mirrors
Coastered and air/fuel screws at 2.5 turns
ACCTs to MCCTs
Degoated with Harley mufflers
Duro 110-90-19 front 150-90-15 rear
Pick-up coils at .020 Spline lube