It's 3 years old but it only just turned up as a suggestion for me. Does not seem from a search to have been brought up here in Single Shot....
https://www.youtube.com/watch?v=VknbHIGgziE
All I can say is that I have a serious case of "gun lust" from viewing this little toy in all its magnificence.
I think that if I were to play around with making an action and finishing it into a nice little target rifle it might well be something along these lines.