Last time when I was playing 219, a bunch of boxes were dropped in T1 / T2 zone.
I left them there because I believed that it was possible to get a T3 if I picked it up in T3 zone.
After passing the codes wave, I combo 3 kows together and 1 of it dropped a arm box and I got T3 arm (I was in T2 zone)
Then I killed 3 more kows and I reached T3 zone. I quickly ran to those boxes and I got T3 body and head.
SO IT IS POSSIBLE.
and dont be mad that I got a whole set in 1 game lolol, and you filled up your inven with T1 parts for 5 times.