If you haven't gotten your copy of the winter edition of The Rovers North News, get one, and go to the article on the bottom of page 20: "Go Ahead-Supersize Me" by Craig Reece. He describes his project, A D100, built on a Disco chassis, work done by Shane Ballensky, of Rover Hybrids. He has a website,
http://www.roverhybrids.com. Sounds like what a D90 should have been, all along.