We do not have our own TOTM anymore so maybe we can just piggyback on to Meloden.net's TOTM?
This month they have chosen Andy Cutting's Flatworld which, I think, is going to be a challenge on a concertina.
Here is a link to the Melnet thread (you do not have to join Melnet to read and to listen):
From Clive's initial post:
Some ABC notation can be found here:
and there are other sources out there on t'internet.