Welcome to the Edge! As soon as I saw the username I guessed that you were likely to be an Irishman!
The university societies in the greater Dublin area are quite active. It all really depends on what part of Leinster you are travelling from [Longford to Wexford may be a bit of a trek].To the best of my knowledge there aren't any physical shops around anymore [esp in Leinster] - there are some online shops where you can avoid paying overseas postage [these guys tend to come along to juggling conventions]. If you are on facebook, then I'd recommend having a quick gander at the Circus and Juggling Ireland facebook group for getting up-to-date information (I'm not as in-the-loop on the Irish juggling scene as I used to be) https://www.facebook.com/groups/453011074778509/