Give Russ N Hound at cowboyandcowgirl.com a buzz. He can probably do an "ivory" inlay of anything you want and can reverse it so you'd have one on each side.
I'm just giddily satisfied with everything he's done for me (Three rifle stocks and a watch chain ornament, so far) and his wife Foxy Hound does some great embroidery work, too. I have some other stuff in the mill, as well.
It would be unique until someone else decided it looked good enough that they'd buy one, too.