I may have misunderstood the question, again, I’m an avid guy not protools but why not…
export the protools session as an omf, and just suck this back to your avid and sync up to the old spot.
If he can’t omf he should be able to blow each track/pair out as wavs,
if the protools session isn’t that complicated then a last resort is a session back up on protools which will save all elements within a single folder