When we moved into this house our Neff gas hob was missing some rubber feet on the racks which protect the silver metal. I spent a lot of money trying to replace them. All that happens now is the rubber bits just fall out ever time the racks are lofted for cleaning. Anyone know what I need to buy to replace them? Is this a standard gas hob thing? I've only had ceramic hob and induction hob before so don't know about this... obviously I did Google originally when I wanted to replace them and didn't get far....help please oh wise Mumsnetters.