getting a Diamantschwarz(spelling?) 1991 318is next week. It has silver(0270?) carpet/headliner and cloth sport seats. I want 2 swap over 2 black leather/vinyl. Gonna just do the doorcards and rear seat cards, front and rear seats, and rear headrests. Will this look ok? Were any offered like this? I plan on black floormats after I get everything swapped.Also, was the rear headrest a stand alone option? was it offered on the 91' 318is? my donor also has the rear armrest in the seat.