there are various adapters on eBay for one type of digital back to various cameras. The only ones I've seen for the 6x9 horseman are for Sony NEX, and really they're just graflock. There may be manufacturers that make what you want, but I haven't seen any. (i have a VH and VH-R so I do have an interest in finding something. I currently have a Credo 40 that I'd like to adapt to them, but for not it stays on my Technikardan 23)