onlyfire Charcoal Ash Basket Stainless Steel Charcoal Holder with Handles, Fits Kamado Joe Big Joe Grill

This is the exact one I have. I've been told it is not available in the UK for some reason, but the dimensions are listed: https://www.amazon.com/dp/B07CWQ58LD?th=1 (18.9" Top / 12.2" Bottom) It seems like it fits pretty good to me.

It's supposed to be stainless steel. This is the one I have: https://www.amazon.com/dp/B07CWQ58LD