Ouch - that's the most expensive part of the computer. I replaced a LCD screen on a digital camera - the part was found on ebay. Perhaps a computer 'scrap yard' online ? Be prepared to DIY on this one unless you have a buddy nerd who likes to take about these things and able to put them back together again.
expect to have little "dings" on the plastic seams - those laptop are a chinese puzzle to take apart.
OR avoid the whole thing and just put a monitor on the laptop ( connection in the back) - no longer portable but should automatically change resolution to the "second" monitor.
Most modern laptops are automatically equipped to connect an external monitor