Bought a used shift assembly off of eBay. Instead of replacing my whole shifter, I removed the gray plastic gear selector from the purchased assembly and installed on my shifter in place orf the black shiftlock piece. It was a bit fiddly to do since there is such little access to remove and reinstall the two screws that attach the selector. Also had to remove a very small pin from the foot at the bottom of the shifter shaft, put the gray gear selector in place and then reinstall foot and pin before putting in the two screws. Not easy but my car is proof that you can swap a gear selector from an older automatic and put it on a 93 in place of the brittle shiftlock selector.