Just put a 6 piece set from Texas Mustangs on my daughter's 91. What a Difference!! The h/l portion was Genuine Ford. $119 for the set. Individual h/s run about $40 each.
mine look glassbut are plastic, they are really awesome looking, just installed them, they dont fit right though, when it warms up i'll figure it out, but i also got super blue bulbs and it really helps over the foggy stock ones.