Latin Scholars, please confirm translation....?

I would say:

In Sacrificio Salus

You have to use the ablative case with "in" here and "salus" has to be nominative case.

The form of the above corresponds with the famous

In Vino Veritas

Just a small edit:

I did not use "intra" as this rather means inside in a local sense e.g. "intra muros" inside the walls - which meant the part of an old city that was enclosed by the city walls.

My suggestion is that Hazel used Google Translate, and isn't paying attention enough to recognize that there's no way that "salvation" in Latin is "salvation".

In sacrificio salvatio cubat

EDIT: Changed "sacrificium" (accusative) to "sacrificio" (ablative), and "salvationem" (acc) to "salvatio (nom).

my suggestion is "Intra Sacrificium iacet Salvation"