Housing from August to October (Dublin)

Hi everyone
A friend and I are moving to Dublin for three month to join Prof. Dr. M. Senge at his research group at Trinity College on a scholarship of the Science Foundation of Ireland, with we received. We will arrive at August 2nd and will be staying until the end of october.
We are looking for a cheap two-bedroom appartment, preferably close to Trinity College. Since we have no precise idea about where to live in Dublin is good, we are thankful for any information, too.
The appartment should not be more than Protected content .
If you have any information or offers just post an answer or send an email.

I appreciate your efforts, thanks very much
Andreas (Germany)