Brent Riley has a direct phone number  219 243-9406 in Granger IN

Hopefully, these wonderful blades  are still made!  It would be a loss
to those of us who can't live without them.  There is another source of
this blade, try American Master*Tech Scientific, Inc 800 860-4073

If you find out these are not available, or that someone else is
marketing them, would you PLEASE let us know

Thanks and good luck finding them

Gayle Callis