Summary

These are the 3ds files converted to STL files from http://www.thingiverse.com/thing:1069120

[Edit: Audio board added]

So you can use (say) OpenSCAD to make cases.
They have been collapsed into single objects for this purpose.
If you need them as separate objects then the original 3ds files can be used.

Their positions are as supplied. Images show the core dimensions.
The OpenSCAD file registers them based on their mountng holes.
The rest is up to you :)