Can you get the Shadow-Trap head?

It’s annoying, it seems like I can’t find any details on Shadow-Trap dropping this head. Does he drop it during the fight with him in the arena (Racist Hotdog and Kitty) or does he drop it during the fight with Eclipse?

I wanna do my Claptrap playthrough but for some stupid reason I wanna do it as Shadow-Trap…and I refuse anything less. (I know lol…)

Edit- so I found out Shadow-Trap can spawn on Round 3’s in L33T Hacker mission, it’s just…holy cow it’s so rare it seems. (I really want that Shadow Trap Head, it’s just idk if I’m wasting my time now…)