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I have seen the 10's on e-bay

I am not sure about Sub Cero, I think the name is related to the tempering method but not 100% sure.

I have seen a bunch of #10's that are stainless,
but here is a post about #13 stainless...

I am going to list all stainless I have seen so far.
Shultze (sp)
Bocker Arbolito Alemagnia (line no longer made)
Puma
Filarmonica
Henckels Fridour from 5/8 to 8/8
Wusthof
Effendi - can't...