I found another way. On start interface resource add and instant remove armor to localPlayer, it's turning on armor bar, then taking health bar coords, armorY + (healthY - armorY) / 2 = breathY. And it's working perfect.
UPDATE: for correct working of this method you need to let armor bar to be drawn for 1 frame at least. I used a timer, which checking armorX and armorY, until they became not 0, 0.