Yeah, ive done it. Paid £450 for mine. Wasnt that hard to put in, fronts shouldnt take much doing, just a drilling of a couple of holes in the seat frames. The backs can be trickier, i removed the cushions and covers from the 172 frames, and swapped them straight onto the old 16 valve frames. If you take you time, the results are worth it
Ask for adams_2k fitting guide (posted on here somewhere), excellent stuff showing you step by step with pictures