If you have the back off the display (you'll have to do that eventually anyway) on the bottom there's a manufacturers tag with part and model information. The vendor should be able to cross reference from that to identify which screen you need.
I would want a grantee from the vendor that you will not be charged restock or return fees if you do this and still get a wrong part. Also if you pay with credit card or Paypal they will help you if a dispute arises. . . if you write a check you're on your own.
If this answer is acceptable please remember to return and mark it accepted.