@Lounds, Do you have any idea of how huge the task of installing a gpu onto a laptop is? With a desktop any fool could do it but laptops aren't designed to be upgraded, with a few exceptions of course, like RAM & harddrive.
I mean, just getting the mobile gpu would be a pain in the arse, doubt you could find any brand new ones available, fact is manufacturers don't want people to be able to build & upgrade their machines with ease, they rather somebody replace their laptop every few years than keep a single one & replace individual components throughout a much longer period that unless they also make the parts too, they get nothing.