Ok got an answer for this problem. I found a motor here that somebody had used an aluminium pulley and machined it to take a boss off the F/C and grub screwed it to the boss I think they probably heat shrunk the pulley onto the boss. Anyway this is an easy fix tor what could have been the end of my last few 24's. At this stage I am short of 1 slider plate but it is not worth me getting just one laser cut.