Take a lens board and shutter/lens flange to your friendly local machine shop, have them set up the lens board on a lathe to bore out the hole to fit, drill-tap the holes (make sure the shutter orientation to lens board is clearly marked) for shutter/lens flange, install the shutter/lens flange on the lens board with screws as needed, done.
Do this all the time with non-standard lenses on Sinar lens boards,
Bernice
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