I have seen a few Dakota sets in the last few months. Two were a .338 Lapua/.416 Rigby like the set below:

http://www.gunsamerica.com/993748558/Gun..._Barrel_Set.htm

Another was a .330 Dakota/.404 Dakota that had two Swarovski scopes and the factory travel case for $9k. This one was from First Stop Guns in Rapid City but seems to have sold. The regular 76's are nice but I have never handled one of the Travelers. I don't know anything about the Heym.