Look on the broken LCD and get the part number for it. You should be able to find an exact OEM replacement.
It's recommended, but you don't have to get the exact OEM screen. It does, however, have to be some sort of replacement for it. Think of a replica screen that's the same design and specs, but different brand.
For $300 price for a screen, I'd look around a bit more, or maybe just use the laptop as a desktop for a bit with an external monitor/keyboard/mouse till you either save for a new laptop or the screen swap.