There are no links to "all those liquid coolers" because there's no such thing as "a liquid cooler" that cools 2 GPUs and a CPU..... these are cooled by "custom water loops" that consist of numerous individual parts, usually from various manufacturers, that are are assembled by the user into a custom water cooling system.
The is only one link......http://www.frozencpu.comhttp://www.tomshardware.com/answers/id-1772361/kind-liquid-cooler-wanna-overclock-cpu-gpu-gpus-cpu-6ghz-8ghz-gpu-1150mhz.html#11380723
Simply put each of the listed parts in the home page's search box to see the details on each individual part that makes up a complete system.
If you find it too confusing, ya prolly not ready to build a custom water loop. Also, as indicated on other thread, you wanna buy the EVGA 780 with water blocks already on it..... EK for example has no full card waterblocks for the 780 ACX
so buy these pre-assembled cards with water blocks preinstallled and custom fitted for that card.