You will probably have to buy an entire grille. The emblems do not come off readily, and usually break. When they are removed the paint on the reverse usually is damaged severely. The emblem is unique to the 91-92 OCCs, and even then, they are different colors. 91 is sliver, and the 92 is candyapple red and silver. I used to have one laying around, but have not been able to find it for a while. The paint on it is spoiled anyway.
I looked for one for about 2 years, and finally bought a complete grille.