Steve,
Tidewater blacksmiths uses The Hartford $475. per year for 2 mil liability. We just got our new bill Here's the info we have; The Hartford, 301 Woods Park Drive, Clinton, NY 13323 1-866-467-8730.
Virginia Bureau of Insurance, 1-804-371-9185 or (VA residents only) 1-800-552-7945.
Also one of our members says he uses Nation Wide said they have a Blacksmith policy for around $200 per year .
I don't know about the blades though.