What I used for mine was the 2 air intake valves off of a cheap respirator mask. They popped off and I painted them black -Greg
My guess is that they are a part of the found jumpsuite, which I think (if I remember correctly) is a diving skin of some kind. It's the same piece that was used for "cantina dude" This is just my speculation though so take it for what it is.
They are part of the real suit
I think it was a Windack (sp?) flight suit IIRC
I read a thread a while back on some other forum
hard to keep track
check out CuteLucca.com Abby's website, there is a Bossk section about her build and what her stuff is, a lot she made herself... her suit was amazing, wish I would have bought it. Believe its in Carolina now.