Screen Replacement Question [7 inch Screen]

Hi All I was thinking of converting my screen broken S3 into a InDash car pc. SO I need 2 din/~7inch touch screen to attach to s3 instead of regular samsung s3 screen.
My doubt is if I buy something from ebay/amazon any other place, I'm not sure, if I'm going to get something compatible with s3. So anyone has idea of s3 lcd connectors please comment.