I just contacted AyA (dirrectly in Spain) and they told me that for custum stockmaking they need:

LENGHT OF PULL
DROP AT COMB
DROP AT HEEL
AND CAST

It's logical. But what have I do if I don't know these figures?

When I proposed to give them my body dimensions they refused.
Very interesting situation. What shall I do? Go to Spain?

Unfortunatelly I Ukraine I haven't seen any try-gun.

Theoreticaly I can measure my available guns but thuth to say their stocks aren't ideal for me. I need something better.

In result I'm returning to one of my previous post where I tryed to find dependance between shooter and stock dimensions.