Does any one know of any aftermarket accessories in order to put a car seat for my kids to ride in the back.
http://www.camaros.net/forums/olp/images/misc/progress.gif

Besides the lap belts, You could run the seat top strap from the carseat between the seat back and package tray which could clip to something in the trunk area ?

Or

You could ask Dean what he does when he comes down from the Great White North (Canada) with family in tow.