There are two ways I can suggest.
First, go to the groups tab along the banner at the top of the page and search for groups in Ireland.
Second, you can also look for a group of people who use the Medtronic Pump.
You can post a message in either/both of those groups stating that you are looking for Medtronic users in Ireland. You should be able to come up with any Tu folks in Ireland that use the Medtronic pump.
Hope that helps and good luck.