I have a slightly used WeatherTech pet barrier for the rear of your SUV, Wagon, or Van. We had it in the back of our 2015 Toyota 4Runner for about a year and a half to keep the dogs from jumping over the back seat into the passenger area. It is a universal type product that extends/retracts vertically and horizontally to fit your specific vehicle. It's made of strong steel tubing and heavy duty resin joints with rubber feet on top and bottom so you won't scratch or rip any part of your interior.
I have the original box and manual for it. It is next to new looking with only minor scuffs in a couple places. It was about $100 new; I see now they are selling for about $110 online. I would be happy to pass it along to you for $70. Send me a message here on BisMan. Let me know if you need any maximum/minimum dimensions to see if this will work for you. This will definitely keep that rowdy dog safely in his own area. Thanks for looking.