You might want to try King Koil, I think they manufacture in Naas but you can buy them nationwide - we bought ours 'down the country' and has it shipped to Dublin, saved a fortune. Not sure if they do ortho matrasses, but they are certainly the most comfortable beds. We bought a full bed from them a few years ago, I suffer from a bad back and I have to say a bed is almost an invenstment, ratrher than just another piece of furniture. 5 years on, no back pain....