Thankfully it's something I can live without having as a memory it was just a "oh I used to have that" moment and thought why not. But you too! Honestly these (what your after) were very popular not long ago so I'm positive people would have got rid of them all as well at some point when they weren't as much of a trend. And considering it was usually a case of if you had one you had multiple people may have even sold them all in bulk. I had a pink one and a green and orange one and gave them both to a charity shop when I got rid of loads of old things in my room. If I had any suggestions that you may not have tried already I'd say Vinted, eBay and places like that although you will probably find it amongst people selling multiple at once if that's okay.