Thanks
@BMBabe but I don't have one available, well not separately.
Most people, would I imagine sell them as part of a complete set with the roll hoops. I have 2 complete roll hoop sets at the moment but mine will need to go as part of the set.
To be honest I'd rather dress the plastic back down or wrap it than try to improvise anything else. It wouldn't look that bad and is tucked away at the back until you can take your time to find another.
It can be probably be professionally repaired too for maybe little more than you may get charged for a lid only.
Rybrook allegedly still sell new for £130.