I grew up in NH and a rite of passing for a young hunter was the day that he/she got his/her first Johnaon Woolen Mills plaid jacket and green wool pants.
L.L. Bean, Codet, Labonville, and Woolrich (among others) all sell wool pants and jackets.
If you can find used clothing from Beagle Wool, they are first class. Beagle went out of business some years ago, but their jackets and pants show up on eBay from time to time.
