I have two complete sets of articulating seats,  One is almost new in leather with all the plastic and interior parts.  Complete from 91 MSE.  If someone wants to convert an older exec/statesman or 201, 231 to the later vent system I have all that is necessary including dorsal vent and accompanying tubing and overheard plastic.  also the hardware to convert straight back or reclining rear backrest to the later style full fold down rears as well as the plastic bottom under rear cushions.  also ha