Hi ap9dm1,
Double check with the med docs in the Mater. I also have a CAA class 1 medical and recently made an enquiry to the Mater about renewing it in Ireland. They informed me that it wouldn't be a problem to renew it with them and that it would cost around 200euros.
I recommend asking to speak to one of the med doctors to get positive confirmation.
Good Luck.
Matrix777