I am BRS myself.
But from your link
6 Stage Aquarium Reef Reverse Osmosis Water Ro Di 100 GPD Membrane NSF Certified | eBay
Once you have the 10" housing you can order your replacement filters and DI
media from BRS or almost anywhere.
The unit you linked looks like CRAP IMO
The ability to add cheap $3 higher micron "prefilters" will save you money on filters in the long run.
I added one more housing to my 6 stage chloramine deluxe!
None of the units mentioned yet have the bells and whistles many may not realize they need(float switch,3 choices of connection,pressure gauge,rinse switch) that are all offered on better BRS units.
the 6 stage I linked from your link ships to you!!