You probably can't locate them because they are not there anymore. Once worn out they usually brake off. Locate the shifter opening in the shaft tunnel. The bottom of the shifter is connected to a bar with a small clip. There should be a bushing right next to the clip. Same goes for the front just follow the bar it connects right above the start/safety switch on the transmission. This is not an easy job the bushings are stiff and difficult to put in. There are some tricks to installation that comes with experience.

Vin