The file 'Laser Cut Sphere PMMA Vert' is (dxf) file type, size is 444.6KB.
Thank you to CRAB for his file.
http://www.thingiverse.com/thing:4609
I expanded a bit more parts because PMMA breaks easily.
Superb file 'CRAB' has taken us.
SPhere_PMMA_Vert.dxf | 2.8MB |