I spoke to my local dealer the other day as I was after some. The subframes without the sliders were £1200 a seat! Over £5000 for the pair of seats! He couldn't belive what he was reading off the screen. Apparently you can't buy the seat as a whole you have to order it all separately?
...you can get them without the RS logo direct from Recaro or pretty much any specialist online dealer...they are available in leather trim as well....they are expensive. Been looking to get some of the seats that were put in the 182 Trophy....work out at £2000 per pair (as far as I can see)....