I also live in Ireland and i have PKU. I order my food (also free) on prescription, through my local pharmacist. my dietician lets me no of any new low protein products coming out and sometimes will give me a sample. if i like it, i tell my pharmacist and he orders it through suppliers.
my dietician also informs me of any low protein cookery demonstrations in the area, which include great ideas for low protein recipes.
i suggest you speak to your new local pharmacy and they will help you.