It's all trial and error so I know how you feel.

I lack access to a lot of products as well because I'm from the Netherlands. We're blessed to have the Mariposa Import webshop (that ships to Europe!) but it is quite expensive.

People also have recommended iHerb and I believe I read a review on the product review board, so perhaps you can check that out.
F - LP - HD - NE
Fine, low porosity, high density, normal elasticity
Hairtype 2c

Low poo: Petal Fresh Organics Rosemary & Mint Volumizing Shampoo
Protein: IAGirl's gelatine treatment
Detangler/RO: KCKT or Curl Junkie Beauticurls Argan & Olive Oil
Styling: KCCC

Beauty Is Not a Number