I have a PWT, but fortunately not had your bad luck with drives. My understanding is that if this is a unit from the end of the production time, then it uses a standard computer DVD drive easily available from ebay. Also, that swapping it out is not a major undertaking, with the trickiest but being getting the door cover off one unit and putting it on the new one. There was a long thread about it a few months ago - worth a read.