Perfect gift for my perfume-obsessed mother– please help!!!!!

Hello all!

I am in dire need of some help. My wonderful and brilliant mother has recently gotten into perfumes, and she is a woman obsessed. I am not exaggerating when I say she has sampled well over a thousand different perfumes over the past year, and she has carefully catalogued each and every one of them. She has a massive note on her phone where she has written her thoughts and sorted them by brand, by favorite note, and by primary note. She has sorted her small sample bottles into separate themed boxes (woody, citrusy, floral, powdery, gourmand, "The Weird Box", et cetera). She is so passionate about her collection and she wants to grow her skills and train her nose and expand her palette.

Although this makes my mother incredibly cool (in my opinion), it also makes her very hard to shop for. I want to buy her something perfume-themed, but it cannot be a standard perfume or sample set. She probably already has whatever I will try to buy. I want to get her something genuinely unique that will help her become more knowledgeable and dive deeper into this hobby, but I don't know what that is.

So I need your help! What are some good gift ideas for a budding perfumer? I'd love to find some really interesting and unique super niche brands that she hasn't discovered yet. Perfumes that can help her expand her horizons! Please help!!!