If the person is dead and the will has gone through probate or administration then it is available to obtain either from the local district probate registry or the probate office in dublin. Usually in your local court house for the local ones, you do not need a solicitor to obtain one, just go in, pay a small fee and voila.
If you are looking for a will for someone who has recently passed away then it is unlikely that the will would have gone through probate yet. You can ring the local solicitors of the deceased and ask them if they hold his/her will. It depends then on whether you are a beneficiary or the executor whether you will get a copy or be told what's in the will.