An auto detailer might have some technique in his bag of tricks that isn't mentioned on an online board. I doubt this is the first time this has happened.

Did you try Erie Vovo http://www.erievovo.com/?

They have a pair of gray cloth seats with the SIPS with a "buy it now" price of $250. I doubt they put the regular rear seats on e-bay -- there IS some demand for the ones with the optional child booster seats -- so you'd need to call them for the basic rear seats.

I suppose you could switch to a full leather interior but you'd be buying 11-year old leather so it's likely to show a lot of wear on the driver's seat and cracking in places where it's not worn. The door panels are different, too, at least on the V70. The easiest and cheapest solution would probably be to replace the rear seat with a used cloth one.

-BTC

'98 V70 T5 5-speed, 173k mi, heated velour cloth comfy chairs, factory HD suspension, Bilstein HD, front IPD stabilizer bar, Volvo strut tower brace and skidplate, XC grill, C70 jewel E-Codes, V-1, Lidatek, IPD stuff, JB Weld, Original Duck tape, zip-ties, two '06 Honda license plate nut impressions in back bumper (gift from daughter), Mobil-1 since new.

"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair." - Douglas Noel Adams (1952 - 2001)