Door Hinges

The driver doors of my S3 has play. I checked the domed plastic screws and they are OK. They have probably been reclaced by the previous owner. But the cup bobbins are worn out. How can I change them? It looks as they are casted in the polyester of the body.

Does someone has any advice?

See message no. 21441 from Brian Walton on the Elan mailing list, he outlines a clever idea to repair the hinge socket.
Regards Brian G.
64Elan/72Sprint/J.P.S.Europa