Raritan has used the name "Vortex Vac" to describe the power of the Marine Elegance pump since the day they introduced it.
Yes, you can retrofit the SeaFresh system any time. Although I only had to google "Raritan SeaFresh" to find the info on the Raritan site, Raritan seafresh.pdf
, I wasn't able to a price or a retailer who carries it either. That's prob'ly because although plumbing it is fairly simple job, wiring it is complex enough that Raritan recommends having it installed by a marine electrician.