OK Bruce, I've read your inquiries and comments over on FB (I don't do FB--it's the devil). You want it to be stock. I am in your situation: my Deadwood broke it's switch back in October. It still "works" in that I can turn it on and off and it locks. With that said, it also switches itself off with no warning because the butterfly is what provided the clicks to hold the switch in place.
Can it just LOOK stock or do you absolutely want it to OPERATE stock? By that, I'm asking if you would settle for a butterfly-looking escutcheon that didn't actually rotate? It would have a lock in the center. It would be center-off and still rotate back for Acc and forward for Ign. The only thing is, you'd have a key always in the lock when it's running and the butterfly would no longer do its thing. Looking at it, only the most trained eye would spot the difference (much like the Stavos kit).
That kind of kit would probably be in the $200-300 range, just because of all the CNC machine time to whittle out the sculpted shape on the butterfly, the cost of the switch, connector and chroming.
Optionally: would it be acceptable if the escutcheon just fit into the hole in the stock housing (no alterations required) but, would do away with the butterfly shape? This would probably be about $100 less, simply because there is so much less machine time. The escutcheon would be a skirted shape that would mimic the center shape of the butterfly but, wouldn't include the tabs/wings. So you'd have a fixed lock assembly, it would look appropriate for the housing but, the butterfly tabs would be gone.
Everything is worked out in my head and I have two of the chosen switches (one barrel and one flat key). What I don't know is if these switches will withstand the vibration of being on a bike. Without some testing of my own, I don't want to just turn you loose with an unproven design.
The simple version of the escutcheon could be banged out in an evening (without chrome). Reverse engineering the butterfly shaped version is going to take some time. There are a lot of curves and draft angles on it to make it casting-friendly and that makes it a tough shape to model. I have to invest in the proper crimper set (a few hundred $$) and buy some pins and backshells.
How desperate are you to solve this right now?