Hi

Do you mean the small plastic insert that holds the heat dissipation grill to the aluminium lid? If you are - I did like this:  

I made a new insert from a steel sheet of 0.9mm thickness. I rounded it on a grinder and made the "conical" shape to fit in the grill. Then I bent it according to the shape of the original plastic part and welded a little steel rod on the other end of the part that fits in the aluminium lid. Did this on both sides and it has been there for 10 years now without problems. It's a little tricky though.

/Fredrik

This part breaks on all Beocenters of the 5000 and 7000-range. The dampening grease hardens with age and the lid gets forced up and down until finally the hinge piece breaks. I may have a new original part in stock.

Todays tip; A tiny amount of contact cleaning agent sprayed down the hinge piece losens up the grease immediately, this will free the lids movement. Contact cleaner is also good for cleaning the extremely sticky grease off parts and fingers. 

Martin