Emulators are cheaper. ~$200 I think... installation is a valve plus some drilling of the rods.
Full cartridge systems are complete internal replacement. I think it is called the GS-3 system (or something similar).
The price used to not be listed on the website... I'm not sure if it is now or not.
But if I had to guess I'd think the cartridge system is over $1000. (Probably around $3000 if you do it up right.)
Stuff like this isn't cheap
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A few 4 years back I dropped my SV off at Racetech and they did the front emulator system and installation for ~$500 total.
Then about 2 years ago I picked up the Racetech custom rear shock, ~1000, totally worth it.