I had a 6x12 one. In hindsight, it was very, very limited. Only focused to infinity and had no movements. A true point'n'shoot.
I sold this, wanting to get a 6x17cm camera. So, I emailed Dean twice, telling him that I'm happy to buy one of his 617s. Like you, I got ignored.
Seems that you, too, have been subjected to his ingrate attitude.
Take my suggestion with a pinch, but I would look at the Chinese cameras if I was getting into these types of cameras again. You can get DaYi/Fotoman/Gaoersi P&S cameras (120/4x5), or you can get Shen Hao/Chamonix field cameras that are [IMO] much better, more versatile.
And they will respond to your emails...