There is some information on the Big Bill line of wool clothing in this thread:
http://www.outdoorsmenforum.ca/showthread.php?t=354265
There is also the Filson line of wool products to check out.
There are lots of options for weatherproof, insulated synthetics. Many camo options available from the big name brands (Sitka, Kuiu, First Lite, etc.) in the hunting industry, many solid colour options available from the outdoor sports industry. Problem with many of the synthetics is they are noisy, and the materials are less durable. ie. not fire resistant and prone to tearing.