I had a Connie/TB by the wonderful Maplehurst Michael McDaire. He was a truly incredible little horse who I did absolutely everything with until we lost him to colic at age 14. Prettiest, kindest little horse you could possibly imagine.
In Ireland, I would highly suggest contacting Kevin Bolger of Coral Connemara. He has lovely, lovely ponies and is very much involved with the breed there. If he doesn’t have what you are interested in, he could definitely point you towards someone who does. His brother is in the Boston area, I believe, and is involved with ponies as well.
Please PM me if you would like, and I would be happy to give a bit more info.