Where to get niche beers in Ireland?

Hello everyone,

I've seen threads asking about good offies, and good online stores, but even they only stock a narrow range of beers. I've now tried most of those beers, and wanted to find some more. So where do I go for the really niche beers?

For example, I love czech beer but I've not seen any of the really exciting ones in ireland, the porterhouse had a few during their czech beer festival, the czech inn has a few nice ones, but still most of them I just cannot locate.

Another thing, american craft beers, I hear about so many of these local beers that I would love to try, but I just never see them around!

So the question is , where would I find the really niche beers ?

Thanks everyone