Looks like this one. Don't know who sells it. https://www.deconiche.com/blog/blueberry-armchair-by-carlo-colombo

If you're looking for unusual design, you could also look at Ligne Roset furniture for example.

I'm not aware of a stockist for it. I would go direct to the designer on this, send them an email. It may be it is not available anymore https://www.carlocolombo.com/soft-armchair/ there's contact details on his site.

He designed it for BYografia in 2010

Sara... you’re a star thank you. I have been searching everywhere. You saved me 🙏🏻