Go with the wool. I've talked to some BAR folks several years ago, don't remember the unit, and they were very knowledgeable about their arms, equipment, and dress. Some of the organized groups I've looked at or talked to had For Sale sections of websites/newletters. Like the rest of us, they gain/lose weight and have to re-equip, so that might be a possible source. I use wool in the woods quite a bit and I wouldn't want anything else.

YMOS,
Tony