Im glad I decided this as one of the pulleys was dry when spinning and quite loud for a pulley, it also did not free spin. New one on free spinning and quiet.
Using the toyota MR2 manual the cam belt was easy enough to do and went straight on.
The first is a very short video to show you how an idler bearings shouldnt sound! You can hear how long it doesnt free spin for.
and a picture of the cam belt and lower cover on, I will clean up the pulleys and make them look nicer once complete. You can see one of the new idlers.