This company says there is a good chance they can custom make a pair for your Saturn Outlook. They claim the price would be similar to kits already available for other makes. I think it is in the $250.00-$300.00 range.
http://shop.muthco.com/car/custommirror?fs=true
I know one of the owner's on the Ford Edge forum I read made his own pair using their mirrors. He also went with the heated and BLIS options along with the turn signal arrow. His cost was $350.00, but I think that is because of the added items other than the arrow.
http://www.fordedgeforum.com/topic/11399-turn-signal-mirrors/
http://shop.muthco.com/car/custommirror?fs=true
I know one of the owner's on the Ford Edge forum I read made his own pair using their mirrors. He also went with the heated and BLIS options along with the turn signal arrow. His cost was $350.00, but I think that is because of the added items other than the arrow.
http://www.fordedgeforum.com/topic/11399-turn-signal-mirrors/