People who do not prefer buying full bottles what do you do when a fragrance that you want doesn’t have travel size or 30ml?

I like this fragrance from a niche house Ella K Parfums but they don’t have travel size or a 30ml.

I don’t want to spend so much because it’s not only expensive but also that my mood and taste changes very rapidly it’s not worth it.

I’m wondering what should I do here?