Lid for water butt (60cm diameter) (Allestree DE22)

I have three identical water butts like the one shown, but only two have a lid.
So, I'm looking for a third one to fit them to keep the muck out. Each butt is 57cm diameter across at the top, and the lid is 60cm across.
It'd be great to hear from anyone wanting to get rid of one this size! I'll keep this post 'live' for as long as it takes, and will remove it once it's resolved. So don't hesitate to get in touch even after all this time!. Thanks.