part number 40105 is used in the RV-12.
Aircraft Spruce sells it for $40.
sells it for $49.
NAPA sells a similar pump for $72, part number BK 6102001
which is Facet part number 40288 which has a built-in check valve. Check valves will drop pressure, not a big deal unless the electric pump fails. A pressure drop could increase the chances of vapor lock.
I have never read a post about the electric pump in an RV-12 failing permanently. A few electric pumps have quit working, probably from a foreign object. But a good rap with a screwdriver handle got them working again with no more problems.