There will be a new Nickstarter for Frostgrave starting on Monday next week called Forgotten pacts and it will include a new plastic boxed set of Barbarians. Here are pictures of the box art and of some of the figures ( As far as I can tell the figures are metal ones not from the box.
These figures cry Wildlings in the GoT setting to me ! So definitely a box I have to get my fingers on! I found another figure you can get from Northstar. Looks like Brienne of Tarth to me:
The Barbarians should be available in November.