I'm in Ireland as well. You can buy Fenbendazole in the farm shops. FenBen10 is one of the main brands so if you ask for it they'll know what you want. You will need to buy it asap though because there's a new EU law coming into effect where you won't be allowed buy it unless you're a farmer with a herd number. As far as I know, that's happening at the end of January so you'd want to get it in the next couple of days! After that you'll have to buy it from the vet for way more money (unless you are a farmer or friendly with one).