i was just there a week or so ago! (also it's worth noting that I can be folded up flat and fit in your suitcase) there is very little yarn available in ireland actually spun from the sheep of ireland. it's too rough for sweaters and garments. the bulk of that yarn is sent to those countries that make carpets and such.
most spinners, knitters and weavers use fiber that is imported, from south america or austrailia, occasionally japan. in dublin check out this is knit and springwools. i had great luck at this is knit, alas, i never got a chance to find springwools.