If you call kennametal they can probably direct you to a small supplier or their in-house tech staff that can get you what you need. I'm not sure how the crbide insert is used in a centerless grinder but all of the major carbide manufacturers probably have staff that will assist you.
As far as specs for carbide, well thats a grey area. There are proprietary specs per each manufacturer. AFAIK the rockwell A scale is used on carbide.
nick