It's a long shot I know, but on the off chance one of you is using a big old water tank for something else and have lid knocking around.... Happy to pay, just trying to avoid the £70+ for a new one... It needs to be a piece of round plastic 62.5 cm or bigger. We have even grid looking at big bin lids, tubs... But they are just not big enough. Scouting eBay and pre loved, but know its a bit specific! Cheers, fi