I broke the plastic knob on my crockpot lid and had to come up with a solution. I think I did a pretty darn good job. It looks great and feels like it will withstand the test of time. I'll add the amazon link so you can get your own metallic red knob. Fix any pot lid yourself. It's much better than replacing the whole lid, or the whole pot.
Here's a link to the metallic red lid knob:
https://amzn.to/3YpJECq
Here's a basic black knob if you're not so glitzy:
https://amzn.to/3YvsWBs