Sarge:
A Darwin gunsmith who you probably know, Vic P_, made one of these up into a nice sporter for his step-son years ago when they were going cheap in this country. Cut-down mil stock and butter-knife bolt-handle fitted, nice job. Sadly, I neglected to take a photo.

All those I saw imported at that time were 8mm, I grabbed a nice one for myself to keep in original condition for the collection.