97 SW Rear Hoop Pix Yousef
Not sure how we got on this subject today, but there is a rear hoop at the back of my SW. Attached are the pictures. The hoop post runs down just as yours does however there is a second bar that runs as you said forward horizontally and looks like an anchor for the seatbelts for the jump seats. Take a look, I will still bring it by to look at the rear suspension geometry.
For all those wondering, we were discussing weather or not the SW has a rear hoop like the STs do.