Maple leaf: Parts do show up once in a while. Try these guys. Kongsberg Våpenhistoriske Forening
They are the "Kongsberg weaponhistoric assosiation". A group of collectors , and also with some background from Kongsberg. Maybe they can help you. Anyway, I'll keep my eyes open.
Promo: I sent a link to this thread to the above mentioned collector ring. Seems like noone have seen a rifle like this, but the A in circle stamp is definately from Kongsberg. Any chance of more and detailed pics?