Hotpoint Reversomatic Dryer Plus 9325?

My dryer has been working fine but 'squeaking' for the past few weeks like the bearings were wearing/worn out.

Finally got around to taking a look today and the drum rear 'bearing' has been definitely worn through. It looks like a pretty poor design as the plastic drum seems to just 'rub' on the metal hub so no wonder it has worn through the metal!

Can anyone point me in the direction of a service manual or other info about how to replace the required parts? Also, any recommendations on where to buy the necessary parts? I've searched the web and found loads of places selling the front bearings, but none make any reference to the rear bearings.

Has anyone out there done this repair themselves?

Many thanks.