As an FYI: pretty sure Ll Bean is not fair trade.
I'm going to be watching this thread for any good insights, b/c I've spent quite a time looking and have yet to come up with anyone who makes well-made, fair trade clothing in the styles I like for a somewhat reasonablish price.
My best solution has been just buying used clothing. It's inexpensive, recycling, and since it's already been worn and washed you can get a decent idea of how it'll wear. This has worked very well for me to jeans, skirts, pants, sweaters, and dressier shirts, but has not worked as well for t-shirts and loungey knit clothes.