I gave up on finding exotic dowels online a few years ago, so it was nice to see this post, I wish I had found Bell Forest Products site years ago.
Here is the expensive option for exotic dowels. Vertitas Dowel Maker jig is
$200 for the 1" die and $40 for individual sizes, or the whole kit is $350.
The only think I like about spending this kind of money, is that any scrap of wood I have that is not made into a pen blank becomes a dowel. It also allows me to buy pen blanks when they are on sale and make dowels, but to be honest, except for some spindle work, the only exotic dowels I like anymore are Black & White Ebony and some spalted woods for the contrast within the dowel.
I would love to know what your application will be.
- magaoitin