It's a pretty rare rom, might be difficult to find.
I know but really want to have
THE BEST METHOD to run PSX games (and everything else for that matter) is via Retroarch - http://buildbot.libretro.com/nightly/
If you have any questions on how to set it up on Windows please feel free to ask, its very easy.
I am talking about exact version of the game not the original one,I need the one with GTA 5 logo and prologue