Grosskate, I recognize that you're looking for wooden buttons, not plastic, but one option you might want to consider is getting tortoiseshell plastic tuner buttons like these:
I've got those on a couple of guitars, including the walnut Klepper KJ that Howard Klepper built for me. That particular guitar has no ebony on it anywhere, but has a rosewood fingerboard and a rosewood headstock veneer. The tortoise buttons go nicely with it.
Anyway, both Allparts and an online retailer called guitarpartsresource.com carry them.
Hope this helps.
Wade Hampton Miller