Neither LightRoom nor Capture One supports tethering to a ZD.
You must use the software mamiya was developing at the time (Mamiya Digital Photo Studio).
If you're looking for a back that tethers to C1 or LR you'd need a back from Phase (C1), Hassy (LR), or Leaf (C1)*.
*Make sure to check the release notes of each software package as some older Leaf and some older Hassy backs are not supported in C1 and LR respectively.
Yes I know this, as I say in my post, but what I need is someone to tell me where to get the Mamiya Software as Mamiya is not selling it nor offering it for download :-(