How to distinguish the Original and High Copy EVO 4G digitizer?
Here is the link: http://www.etradesupply.com/oem-htc-evo-4g-di gitizer-touch-screen-with-adhesive-sprint.htm l
Maybe if you send your phone to an HTC certified repair center they will have the original one. If you're hunting for a new replacement part you can bet your a** you're getting a copy. You can get some really good quality parts however.
If you really want an original part, most likely you'll have to look for a used digitizer (taken out of a non working phone or similar)