I don't know where you could go to get bird's eye on bird's eye, but it would probably be a private luthier.
Consider this:
G&L discontinued bird's eye maple necks on basses a few years ago due to strength issues. They only offer it on guitars at this time, and with only a 90 day warranty.
Click here to view their Options page. You can get bird's eye fingerboards, and they are beautiful.
The reason is that figured maple - not just bird's eye, but quilt & (to a
much lesser extent) flamed as well - is not as strong as straight-grained maple. Bird's eye and quilt are by far the weakest of the three, and the more figuring in the wood the weaker it is. A bird's eye neck on a bass really needs strengthening in addition to the trussrod just to have half a chance at survival. Flamed maple is usually quite strong, and you'll many times see a lot of flame in some necks - sometimes to the point of tiger figuring.
Ken...