I believe it was the Bark Bettle that killed all the Chestnut trees in the U.S. around 1904. We still have very few American Chestnut trees as a result. Old American Chestnut wood is very desireable among we woodwokers.
A company in Minnesota sells chestnut trees. I have a couple growing in my nursery plot. But be forewarned, they grow very slooooooowwwwwww. I figure I'll be 125 years old before I roast that first chestnut in the fireplace.
If you want the company's contact info, freepmail me.