Looking for Irish themed darts shirts

I'm heading to Wales this weekend to play in a charity darts game in memory of a good friends father. The game is been held in his local and having visited him there on many a weekend I know how seriously the Welsh take their darts. I have googled and for the life of me I can't find where in Dublin you can buy Darts shirts or something similar. We really want the shirts to be Irish themed be it the flag, shamrock or even better an offical Irish Darts team shirt.
I know I'm leaving it a bit late but we figured we're going to get hockeyed at the darts so we might as well look the part.
Thanks in advance.