Here's some research I did earlier this afternoon.
Land's End stocks moleskin pants in the fall, at a very affordable price (under $100), which seem to be well-rated, but they're all sold out.
LL Bean also sells them, and they're well-rated, but some people have reviewed it and said it's not very good moleskin.
And then Orvis has them, at $150, which is more than I wanted to spend, but they seem to be pretty good.
J. Crew also had some in their Bowery fit, but for some...