Just to let you know, those wagons with the stationary seats like the one you posted are made for show, not really much driving unless the ground you drive on is as smooth as glass.
We have one like that on loan from a friend and every little bump you hit jars you from your tailbone all the way up to your teeth. Truthfully, I really like yours. Those spring seats are so much more comfortable.
Plus, I adore your team, they are absolutely stunning.