The guinness export stout (yellow label I think) is the only strong stout made in ireland, and it's about 6.5+% and I've never even seen it here, though the int beer shop should have it (I still have never been there...).
Been back. bought a bottle. It's called Foreign Export and all the blurb is written in French, must have been labelled for that market. My schoolboy French tells me it was brewed at St James' Gate though.
It's 7.5% and you can taste it. A very nice beer, but probably a bit too much of everything - flavour and alc. Regular Export, or Coopers in probably a better bet, especially for value.