The protocol I'm referring to is something similar to what has been used in https://www.brainpreservation.org/large-mammal-announcement/

This market resolves to yes if either:
- there is a new company that offers this protocol to its customers and as widely available for sign-up as Alcor/CI/Tomorrow Biostasis 
- one of the current large providers starts offering this protocol as an option

Note: Oregon Cryonics seems to be offering something at least partially similar to this protocol, but does not fit "widely commercially available"