You can try a closet augar and if you cant get it take up bowl ,turn it upside down and try to fush it out with hose, on th old bowls we use to take a small rope and wash it through the bowl and tie 2 1/2″ 90s in the middle and pull rope back and fort till we got it out, if you have no luck buy a new bowl.
mre11. why would you want it back? If its not causing problems it is probably either in your septic tank or in your councils sewerage treatmernt plant by now. Bob