Hi everyone,
I had the same trouble for ages! Search "tubs uk" and there'll be a thread I started a while back with the same problem and some suggestions. I got mine in Asda, its not as big as the ikea one but my bps still small. I did see a perfect one in PoundStretcher in Cardiff, so Im sure theyll have them in other poundstretchers over the UK. They were about £6 each I think. Good luck!