We got Engin to replace ours a couple of years ago and there are different qualities. If you want to do it yourself you will see them in the D.I.Y shops in Fethiye/Calis. Also Engin gave us a good tip. These tiles should be taken up in the winter and stored until the pool is going to be used again. The winter cold weather is not good for them.
Sorry, I cannot remember how much we paid for ours, however, as soon as we got ours the neighbours came in and saw them and decided they would replace theirs...It's catching....