No.
But you don't have to think about it for more the 5 seconds to come to that conclusion.
Stan Winston Studios are to animatronics what ILM is to digital creation and compositing. They're both at the top of their chosen trees and since ILM charges top dollar, logically so would Winston. Stan the Man did great work on small budgets out of necessity - when Cameron came to him and said "Stan, what do you think - should I do a sequel to Alien?", Winston said "Absolutely, Jim. I need the work!". Now he doesn't have to work on small budgets. If Winston had made any overtures of working for less on an AvP film do you honestly think Fox would've said, "Thanks, but no thanks."