Hi George and Marcia,
It's good to hear that you have a trip to Ireland lined up.
For COVID tests in Dublin, you have a few different options. I imagine that you are departing from Dublin Airport. It is possible to schedule a test at the airport, available at both terminals. Results can be provided as fast as 1-3 hours (depending on the option you choose). I recommend that you have a look at
their website to learn more about booking a test.
You also have the choice to schedule a COVID test with another private provider elsewhere in the city. With a quick Google search, you will be able to see that there are many providers operating in the city. You can contact one directly to learn more.
I hope this information is helpful to you both.
Regards,
Eoin