What Sean said.... the early and less heavy bayonet style(according to Hanson first sold in the mid-1700's) and the later (mid 1820's)Hudson Bay Dag were all made commercially with stick tangs. The only full tangs I've seen (and FWIW I've been studying and making fur trade knives for about 40 years)that have full tangs were locally/blacksmith made - there are a few pictured out there with full tangs but only a few.
Originally all bayonets/dags were sold as blades only - they could then be used as either spear point or as knives. They were mostty popular amongst the Canadians and the upper Missouri tribes, but show up as far south as the Osages. Blades shapes and sizes varied considerably, the smallest I've seen was about 7" and the longest about 15". There are even a couple of originals out there with bronze blades!
For pictures a couple of sources:
Early Knives & Beaded Sheaths of the American Frontier - Baldwin
Fur Trade Cutlery Sketchbook - Museum of the Fur Trade
Mike Nesbitt, writer for Muzzleloader magazine, did state elswhere however that an original much like the CC Columbia River Dag is in a Washington State Museum, you may want to contact him regarding that one.
some pics:
One full tang..Blackfoot sheath
Bronze Dag
From Baldwin's book which shows both commercial blades as well as local made...
A classic Hudson Bay style horn handled presentation dag - commercail handle
The bayonet style blade is shown top right