I feel your pain. I lost my ~2 year old cat to anemia about 15 years ago. She was the best cat I've ever had. She followed you around, slept with you and on you, and slept in paper boxes, brioche boxes, and so on. She slept in the weirdest positions imaginable. I've never found a cat like her, though I think I've seen parts of her in two cats I currently have. They have similar behavior, but nothing close to the original. I'm so sorry for your loss. I know it's hard to lose someone you love like that.
I'm broke, but I'd happily donate €100.
I know, she was special and loved everything she did! She was unique and I still miss her to this day 💙 I'm so sorry for you