Been looking around the net a bit for recommended taxi firms in Dublin, and this one seems to come out top... i have no link to this company, only going on recommendations.
Scott A. replied:
Also found this company who do 8 seater MPVs to/from the airport... http://www.dublintaxitransfers.ie/?gclid=CNKVyPOXzr0CFWjKtAod8DgA0 g