Update #2. After 2 weeks of silence today I received a call from Weber's CS. The guy said that it's difficult to replace the legs after 8 years as they have 2 years warranty. So I said that it might be also an issue with the kettle which has 10 years warranty. After a little quarrel about the definition of limited warranty he agreed to send me both, new legs and a new kettle😀 Now I'm happy (or better to say I will be as soon as I will receive the parts)😀