Check the manufacturer website, eBay and local non-corprate stores and repair shops.
That's what a repair shop would do.
Just make sure you know exactly what to do and the most minimally invasive way to do it.
Also helps to practice pulling other stuff apart and doing mock repairs on less important devices if this is the first time you are replacing a screen.
And remember, don't tug on ribbons and wires. If it isn't coming off easy them there will be a small switch of sorts that locks them in place or they aren't meant to be taken off without a soldering torch or pen.