got blackout blinds too (even though Isabella is still in our room, never mind!) and they are fantastic. I got them in Hickey's home furnishings beside Tony Kealy's in Northside. I think they were around E50, so Doreen definitely got a bargain. All the same totally wotrth it for when she goes into that room. They really really blcok out any light.
I picked up those blackout curtain linings in the Bargain basement in Arnotts a few months back but they are pretty popular so id say they have plenty in stock and they come in all sizes for thirty Euro
Harry Corry is in Airside I seen blackout Curtains & blinds in there a while ago, But I am sure they would still have them. DOnt know how much they are thought