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yup. this is the 'correct' answer lol

Not sure you'll get a firm answer on this one. it might be best to ask for good people/companies that might be willing to treat your steel, and then reach out to them directly for pricing...

As...

bearing steel is actually pretty common for manufacturing of razors..
as for scale material, check out masecraft supply. they have some good stuff, decent prices, and a good reputation for customer...