You know the design, the gizmo was used all over the place -even upside-down (and wall-mounted) in the engine room
I'm afraid I don't recognise it.

In the avatar it looks desktop sized. But since you intend to make this out of a cupboard, I'm guessing it is considerably bigger than it looks here. It is floor standing isn't it?
As for being water cooled: Some discreet vents on the reverse or underside of the case may be enough for air cooling. As long as the hot and cold airs are channeled/piped through the case effectively, it shouldn't really matter where the inlets and outlets are.