In a search for healthiest Sony XM4 Cushions

Hello Guys, I'm looking for cushion replacements for my XM4. But I went through this paper: The Sound of Contamination – A Comprehensive Analysis of Endocrine Disruptors and Hazardous Additives in the Headphones, 2026, Brabcova et al. | Science for ME
Which says original Xm5 cushions are very low in dangerous chemicals that have hormonal impact. where can I find same level of quality cushions as the original XM4/5 for my Xm4? There are a lot of OEM and fake ones available, but we all know how terrible those can be. I live in the Netherlands btw