Great to hear from you. I may me mistaken, but did LVC Japan use all cotton thread on their denim? The thread on my LVC Japan 1937's is fading nicely and breaking in some places, very much like cotton thread..
Not sure how old these are, but years ago Real McCoy's did an incredible job reproducing the late 1940's Lee 101-B Cowboy pants. After a little patching and pocket repairs, these are still going strong.