Have you not found his website? A mass of info and recordings of Matt himself, and by various admirers and at tribute nights there.
See: Matt McGinn
We do a Matt McGinn tribute night in Linlithgow every year, which has the approval of his daughters who sometimes have attended: we don't just sing the songs but act them out too, as you'll see from some of the clips on YouTube. The next tribute night(15th)will be on 5th March 2016.
Here's maybe not the best example!
Bar Steward