I want to experiment with different screen layout presets. Preferably set up by professionals, rather than just the default blender preset screens here.
Is there a download source that has a pack of these or some plugin available?
No need to dowload. Just create your own presets to suit your unique needs: http://blender.stackexchange.com/questions/34174/can-screen-layouts-be-locked/34183#34183
– Dec 21 '16 at 02:20
I think this modular plug-n-play feature will be in blender 2.8, called 'Templates':
https://youtu.be/jJJ0_xoD7F4?t=20m22s
– csch0 Nov 15 '17 at 00:33