Some woods are endangered. The most famous in terms of making guitars is Brazilian Rosewood. It's been illegal to trade under CITES since 1992 unless you can document that the wood was cut before 1992.
As for moving production from Memphis or Nashville, if I were looking for a quality Gibson acoustic guitar, I'd be looking for that Bozeman, Montana label anyway - from the old Flatiron mandolin plant.
Gibson is still struggling financially from the Nashville flooding of a couple of years ago.
Ah. Others post as I type. Madagascar rosewood is considered the “new” Brazilian rosewood, as it’s available and considered closest to Brazilian in color and tone.