Clearwater Honing Stone??

Neighbor's kid just dropped and broke my favorite sharpening stone. I have had it since I was a kid, some fourty-five years or so. It says Clearwater on the side. I have looked on the Inet, no joy...

Anybody know if there is still a Clearwater sharpening stone/Clearwater Hone or some such, still in business?

Stone looks like ultrafine sandstone, white with some tan striping running through it. Must be around 400-1200 grit.