Crazy, maybe, but would like to be able to have the kids enjoy the ride once in a awhile, and not have to go home to get another car to pick 'em up, etc...
It would seem the main issue would be the lack of the retractable seat belt coming out of the side pillar in back.

 

I would have to think that the rear pillar has the same bolts as the turbo or a C2 you will have to look if so buy the C pillar out of a TT and put in your own belts.