@pastanaga - There are still American chestnuts around, but very few and none of them are as large as the giants of the past. Those still provide reclaimed wormy chestnut wood.
But, there are groups of people who are trying to breed blight resistant strains of the chestnut. Some of my friends were interested in it, as they lived outside the main area of the blight and knew of a couple of chestnut trees around.
It's difficult, though, because even though they grow quite fast, it still takes a while to grow a tree to maturity so it can be pollinated and provide seed. Each experiment in trying to bring back the American chestnut takes a few years to conduct.
One day, though, people may be able to use freshly grown chestnut hardwood without pulling it up from a reclaimed barn or something.