Running through the boards just shouting that you want "blueprints" will not go over well with the administrators once they catch on.
There are NO blueprints. There are Pepakura files that will need specific software and manipulaion (scaling) in order for you to use them to make a costume.
I don't know why one would think 30 mm is light for armor if it's body armor, now if its ship or vehicle armor that's another story. In fact if you look at modern plate carrier vests both ballistic and non-ballistic they are less than 30 mm. That's even with a trauma plate inserted. For a space ship that's too thin. It wouldn't stop a fast moving micrometeorite let alone a coil gun or rail gun round.