The 737-200 in Dublin is in the aer lingus building right next to the airport, about a 300 yard walk from the main terminal.
You book it through Avtech and it costs 300 euro per hour. This includes the instructors fee although you pay him/her directly on the day, dont know what the breakdown is, I think its about 230euro to avtech for the sim and 70 euro to your instructor.
Avtechs number is (00353) 1 8161750.