A lot of lenders are now willing to pay the legal fees involved with remortgaging (they might insist on using a company like First American who charge an all inclusive flat fee of €999). EBS, Ulster Bank & IIB Homeloans definitely do and BOS give €1000.
As DrMoriarty mentioned though, not all lenders advertise free switchers so if there is a particular bank/building society that you would like to switch to it wont do any harm to ask if they can come to some arrangement regarding legal fees. I know some agree to split the cost and if the cost is only €999 (using FAs Quickswitch) they would probably pay the full fee.
Bear in mind though that you may have to repay the fee if you decide to pay back or switch your mortgage again within a certain period, usually 5 years.