Adding a third row seat in an XL7
I recently purchased a 2002 XL7 for 45,000 Miles. It apparently does not have the third row seat as being purchased as an option. It has rather what seems to be a large slab of Styrofoam or something along those lines, covered with original factory cloth carpeting, and cargo latches. While I love the roomy rear interior, a third row seat is definately needed because my kids get restless on long trips, and need the space.
I have looked into purchasing an after-market third row seat, but I dont know how it would be possible to bolt into the original styrofoam slab installed by the factory. This makes no sense.
Does anyone have any advice as to how one could take an XL7 without the factory third row seat option, and convert it into a third row seat model? any advice would be greatly appreciated