GTRV page on Yelp has a couple recent good reviews, including one customer with a 2015 Ford Transit pop-top conversion. So presumably GTRV is still operating as a small custom conversion shop.
GTRV Yelp reviewsThat Ford Transit pop-top appears to be very low profile - might even fit under a standard 7ft residential garage door. Sportsmobile and CCV (Colorado Campervan) pop-tops require significantly higher vehicle clearance.