This is basically an Mech Armor but with modular armor resistances , inventory size and equipment grid.
The Early-mech-armor can be researched right after Modular-armor.
Details of the research cost and recipe price are visible in the pictures provided below.

Early Mech Armor - Technology (Require: Modular-armor)

Early Mech Armor - Recipe is VERY EXPENSIVE

Co5teL #1307 on Discord for bug report or suggestions.