Hi Allan, I have not had time to read all the posts so apologies if this has already been mentioned.
Lots of cork used in the fishing tackle industry in particular rod handles, these are machined to shape by grinding using a profile template and a similar process to a toolpost grinder on a lathe. If you have a few to do rig up a Dremel type tool in your tool post and use a small drum sander wheel.
Cheers John