Stone jointing

So I’m modelling a stone facade. I need to define the individual stones (my stone supplier needs dimensioned drawings). They’re not in a continuous pattern, but there’s some pattern-like quality.

I could define a complex .pat file and align it onto a basic wall. But that doesn’t show up in plan, so I can’t create setting-out plans for the different courses (my walls are curved, so they can’t be set out on elevation).

I’d really like a cross between a .pat file (to set the pattern), and curtain wall gridlines (real 3D cutting planes), to generate individual stones in a definable, patterned way.