I used to use Photolabs on Lennox Street back in the days when I lived in Dublin and couldn't fault the quality of their output. Alternatively, try GMS on Pearse Street. I'm not sure if they will deal with non-photographers, but no harm in asking.
You should probably check with the photographers of your photos that they are OK with you getting them printed. In fact, the labs may even refuse to print them unless you can demonstrate that you have received permission to do so (due to copyright protection).
- Thorsten.