Hello Brian
If you fancy the exotic woods, you could get a slab from a quality timber merchants and cut it up yourself
That's what I did with the Obechi for my build
I would recommend you go to the local DIY shop and select the planks that are straight and free of knots etc
But you still have to cut it yourself.
When planking, start at the bows and leave about 2" surplus at the stern. This can be used for twisting the planks with a clamp
You wouldn't notice any change in woods, as the hull is painted
Bob