For you veneer people:
https://www.japanwoodworker.com/categories/veneer
They have a decent assortment of hardwoods too, some in 1/8". The pricing isn’t too bad, it’s less than you pay at a rockler or woodcraft for similar 3" pieces.
https://www.japanwoodworker.com/categories/dimensional-lumber?thickness[]=1%2F8"
I’m on the hunt for 1/8" black and white ebony, that’s how I found this place.