I don't know exactly which uses pumps but I can reduce your search field a bit. Almost ALL AIO are actually not designed and parted by who is selling them. They mostly just slap on branding, style, fans, and RBG to an already existing design. Here is a list of people you buy things from and who actually supplies the parts/design.
https://www.gamersnexus.net/guides/2...d-coolers-oems
So it mostly boils down to Asetek, CoollT, Apaltek, and a couple other smaller ones. Probably if you narrow your search to those you probably will find your answers easier. Because something like Corsair is really worried about talking about bling and fans rather than the actual workings of the cooler they really just use from someone else.