OK guys.
Thanks for the feedback on repairs to my ivory scaled Wade & Butcher.
My piano key thought is to check with my tuner who may have some old keys in his stock. I'd swear even the veneer would be thicker than the broken scale.
I have, however, found a US-based source for 'legal' tusks.
www.coastivory.com
I have an enquiry outstanding regarding scale sized, 1/8" elephant ivory slabs.
With an e-bay overbid sunk cost, it may not be worth it to throw much more cash at a worn spine, yet good shaving razor (although I did see a really nice block of Gabon Ebony at the local woodshop...).
I will post again when I get a price from Coast Ivory.
Regards,
-d