THOR MOTOR COACH CHALLENGER 37KT???

Winnebago made a TOUR diesel, I believe, with a similar floor plan about 6 or 8 years ago, but dropped it a couple of years later. That's the only diesel I can remember. Your correct, it's a great floor plan, we had a 2008 Damon Challenger 371 and really enjoyed it especially when the kids were traveling with us. Each had their own private space with the kitchen in the middle.

The bad part was having to deal with Thor and their lack of customer support on known product issues like the cheap upholstery they used in 2008 and wouldn't stand behind after the 12 month warranty was up.