For some reason I cannot find my disc copy of ESO for ps4 and I recently got a new ps4 so I was wondering if I have to pay for a new copy or is there a digital version I can download since ESO is tied to my account.
As long as you are using the same PS4 gamertag you should be able to resume your game, however without the disc you will be unable to play ESO. If you purchased the game initially through digital download it's possible to redownload the game, however a physical edition of the game requires that the cd be used in place of a cd key.