Masercraft Supply will cut Alternative Ivory to the dimensions you want.

They say it is soft and cuts easily and recommend a tile saw.
They say it will walk with a bandsaw if not careful. They also say
dropping it can easily damage it.

Thanks all.
_________________________
Doug Ericson, MD
NSSA Master Skeet Instructor
Neophyte Randall Enthusiast
RKCC CM-081