I had this problem when one of my saucepan lid knobs broke. I got in touch with the manufacturer but they were not at all helpful. On our market we have a man who sells a load of bric a brac, mainly rubbish but he had some saucepan lids one day. I had made a note of the size & one was fine, the same stainless steel finish. He charged me 50p for it so I was well pleased. Maybe have a look around like this if you have a market nearby. hope this helps.