I know that some forummers were lucky enough to lay their hands on a copy of
Voices and Harps during the Dutch tour, so I'm assuming there were some "leftovers" after Dún Laoghaire (either that, or another limited run was done - I can't think of any other explanation!

).
From the way the website reads, the album is going to be launched officially in Leo's on the second weekend in June - to coincide with the workshops that Cormac and Moya are doing. Whether an "official launch" means it's going to be available in shops or just on future tours, only time will tell, I guess!