There seems to be lots of these that are basically front ends to either amazon.com or amazon.co.uk. http://www.shopireland.ie/ is another one, but at least it has some info about shipping to Ireland. Doesn't seem to have the product listed above though.
It seems strange that they are offering products (to Ireland) from the US that run on AC power-I can't find out the voltage details of the product in question, but I would be surprised if you could just plug it into the mains over here using an adaptor?