I have a lot of experience in getting document notarised having completed nearly 2 adoptions (should have the second completed after Christmas).
We've used a notary public for all our numerous documents. I can recommend our guy but if you have a look at this website to find one near you. Ring a few to get a good price.
http://www.notarypublic.ie/
Our guy charges about E10 per document but for our adoption dossiers there was a fixed rate. We paid E400 for the last one. It was probably about 100 pages and there were 2 copies.