im sure that 93+ had them... and i believe plus's had them. not sure on 92's.. but i do think they were on those as well.....
i priced one down here... 85 bucks... but really depends on the area...
EDIT: i see your in dallas. come over and check out fordbastards.com. Most of us over there are from texas.... Im down in San Antonio. But there is quite a few owners up there.. as well as North Texas Performance. Which is owned by the worlds fastest sho owner.... ( i dont know if that will hold up in court or not... but its f***** fast) he works on shos.....