I can't get into a close space around a pvc pipe to place new fittings but would like to 'tap' into the existing 2" line, is there a solid method?

I am not sure whether I fully undersrtand your question, but...

It is relatively easy to work with PVC. Just cut out small section ( size of your new T ), apply glue, insert new T and hold in place for 30 seconds. That should do...