I dont know... maybe this is a far stretched silly question, but... do you have any shed of light of where all the suit parts went after filming P2? They didnt all end up in a dumpster, did they? I know some collectors have a few parts hidden away and only a few pop up from time to time, but overall?
From everything I've ever experienced on a film of this size, one of two things happens: Either the studio gets it all when it's over and puts it in storage, or the effects company hangs onto and recycles it for other projects, or for sequels. It's actually surprising how much of this stuff gets recycled. When Steve Wang saw the picture of my suit, he was pretty sure that it was a cast from the mold of Brian Simpson's suit from P1, which makes sense since I replaced Brian. So Stan had those molds stored and waiting. It is possible predator suit pieces got cut up and used as parts of other creatures, but more likely, the suits got TRASHED. After working with the suits for an entire film, the surface of the suits get really shredded. Especially the stunt suits. The foam wrinkles and deteriorates, and the paint fades. Under ideal, cool, clean air conditions, foam can last for years. Under use and adverse conditions, though, it gets gnarly. Me sweating in that suit after Brian sweated in it was gnarly, trust me - you wouldn't want it. At a certain point, they really do get kind of unrecognizable and the effects guys get so tired and jaded with the stuff that a lot of it does get pitched, or destroyed. You can't just throw it in a dumpster because then you'd have a 15 year-old running around the Valley in a predator suit, but you do cut them up and destroy them, Stanley Kubrick-style.
So yes, I'm sad to say, I think most of the beat-up foam gets thrown away. There is, however, a very nice full predator suit in Stan Winston's display room, but I don't know if that was a new pull from a mold and placed on a dummy, or if they just recycled an old suit. I would bet they did a little of both, casting some new pieces and re-using what they could.