You might check if Lamina at www.laminadesign.com could be a solution. Lamina reads 3dm files and outputs the cut patterns. And at US$180 it is not overly expensive : MoI + Lamina < Rhino naked.

The site has not been updated in a while, so I don't know if the software is still maintained. But after all: If it does what it should, maybe the idea of updates is not pertinent anyway.

Ditto