Maybe I was a little too hasty in my last reply. If the Chamonix rear standard has precise tilt angle markings, you could do a calculation to transfer the desired focus angle change to the front standard, but I don't see any such markings on the Chamonix pictures I've looked at.

You could combine the perspective and asymmetrical focus on a Sinar P series, for example, by setting up the perspective first and recording the tilt angle. Next, you would do the focus correction using the asymmetrical rear tilt, and record the angular "difference" between the back angle at the perspective position, and at the focus position. This "difference" angle would be transferred to the front standard tilt, and the rear tilt would be moved back to the perspective correction angle. If you now do a general focus, everything should come into focus as desired, and your perspective should also be fine.