You might want to check out the M1951 wool field trousers. Depending on size they can, in some cases, be found in as new condition. Also there are a number of surplus wool pants from other countries on the market. I also think L. L. Bean has both dress and outdoor wool pants.
You wouldn't be near Fort Polk?
The Wizard
To paraphase "Oddball" (Donald Sutlerland, "Kelly's Heros", 1970) "I only drive 'em, I don't know how to fix them."
1974 CJ5, 232 CID (3.8 l), 4-speed
with Trailer, Cargo, 1/4 Ton, 2 Wheel, M101 CDN 2
(1994 Land Rover Defender 90)