The above is all you need to link to Amazon, the rest is tracking stuff. :)
The canister and hoses and such on the site are all standard stuff. If you want to know what the filters do, they list those with more detail (and the filters are really the only interesting part).
But I'm not necessarily saying that store and only that store, just that it's one that has a great assortment and quality filters.
http://www.aquacera.com/ceramic-filters.html - describes the combo filter. It's pretty cool, ceramic and active charcoal in one, that's usually a two-canister system. Note they have different models, gravity fed or pressurized!
The multi canister systems are most likely done to be part of a pressurized system though, I believe. See the text in your link that says "Feed Water Pressure: 20-85 psi" - that system is aimed at filtering everything coming into an RV, most likely.
But you shouldn't just buy something off Amazon even so. You should do web searches until you find a decent seeming shop, be it the one I googled up and linked or some other that specializes in RV filtration and then contact them and ask for advice. Every satisfied customer gives them word of mouth advertising, after all, and you don't really know what you need. When you don't know what you need, ask a bona fide expert.
I looked at that site but the products are not reviewed and the descriptions are garbage. For instance, how much micron is that filter?
What about this one? https://www.amazon.com/gp/aw/d/B00TT9I2PS/ref=pd_aw_sbs_201_1?ie=UTF8&psc=1&refRID=SB0X2FZZASED6Q085YNR&dpPl=1&dpID=81w3z3GbU7L
I also saw several with one filter but is this essentially what I'm going for?