hello flitzer.there are a couple of good model shops that i know of in Dublin (I'm a student here.)
Mark's Models is just around te corner from trinity college dublin.No doubt you will see trinity as it is a big tourist attraction.The model shop is down a side street next to the SCREEN cinema.Everybody knows where the cinema is so it shouldn't be too hard to find.
There is another great model shop at the top of o connell's street.it is just at the beginning of Northy Great Fredericks street and whilst a little bit more difficult to find is weel worth the visit as they have some more obscure kits than most.
the toymaster off the Jervis street shopping centre has a good selection of models but is rather limited in the amount of accesories that it has.
Hope this has been of some help.Let me know if you need anymore info.
Me