Dear Aaron,
Since some 3.x version I see that 2.7 unity package is not included.
I remeber I download from asset store a package with two sub package (2.7 and 3.0) and so I can choose what I need to import.
Now I import last 3.0.7f1 and there any 2.7 version.
So it is impossible download 2.7 in the future?
Asset store don't allow to download a old version if you need ...
Thanks