I've recently replaced the back cover and hinges on my MSI GS73VR Stealth Pro laptop. I'm coming to put everything back together and I'm short a few screws. Specifically, some of the external screws for attaching the base to the laptop, and a few of the screws for attaching the hinges to the back cover. I'm struggling to find any information online about replacement screws, or how to figure out what size they are. Any suggestions? Thanks