Call asus support and see if they will sell you one... If you get a price post it, interested to know as well.... If its really pricey ($500+), you might as well get a new laptop.... Personally I won't be getting another ASUS laptop.... Support for there laptop products, are really really bad... Maybe it changed over the years, but from what I saw owning a G74, it sucked for a good bit of people.
GL702VSK / GTX 1070 / M.2 960 EVO
HTPC MINI-ITX / FRACTAL CORE 500 / GIGABYTE GA-AB350N / GTX 1050 Ti Windforce OC 4G / RYZEN 5 1600 3.9GHz / M.2 960 EVO / G.SKILL Ripjaws V Series 3200MHz
OLD
ASUS G74SX-XC1 / INTEL 7260 AC / Samsung 850 PRO / TUNIQ TX-4 / BIOS 203 / 335.23