Not sure about prices in Ireland -- Id love to visit there someday! =) -- but there are remote training collars here that are around $100 USD and they work well. You could probably buy one off Amazon.com and ship it to your address... We have one. They have a 1-5 or 1-10 intensity setting for the shock and a beep setting. Our dogs know that a shock will follow the beep if they dont stop.. so we rarely have to shock them.. This seems to work well for barking and such. Other than that.. I dont know.

We have a lot of bushes in our backyard that are home to birds and the dogs love to stand at the back sliding door and bark and whine until we let them out and then the birds fly away.. We pretty much just verbally correct them. Although I dont think ours are as extreme as your barker..

=) Hope something helps.