Doesn't the camera use Technika boards? I had a factory Linhof 360 Tele Xenar on a Technika board. The rear element was the same size as that of my 250mm Imagon.
I just checked the Linhof webpage. It shows that the recessed Technika board will mount. Certainly the rear element of the 360mm Tele Xenar will fit easily.
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