I agree with jayeff's comment about contacting HP. If your not under warranty, you can find the support information from HP's site below.
The service and maintenance guide for your model is available on HP support site; The link is here:
http://support.hp.com/us-en/product/HP-Pavilion-13-s100-x360-Convertible-PC/8499316/model/9259076/manuals
The instructions on page 41 provide the information that you need, which will include the part number for the display assembly or display itself..
You can find the part using HP's part surfer tool using the link below. There are also some sellers on eBay that you may also be able to find the parts from as well
http://partsurfer.hp.com/