Uniqlo has a well-priced 100% wool coat. https://www.uniqlo.com/us/en/products/E449890-000/00

J Crew as well, when it’s on sale. https://www.jcrew.com/p/mens/categories/clothing/coats-and-j...

I sympathize, though, because in my quest to help you I checked two or three other places briefly (Macys, Everlane) and the offerings I found first all were wool blends