You can't blame Stanley too much. He was concerned everything from 2001 would be reused in some low budget movie the way many costumes and props from Forbidden Planet showed up in cheese like "Queen of Outer Space". There are some well known costumes in the OT that are actually from a Ray Harryhausen film!
It's interesting how much actually escaped being trashed. It appears one of the ape heads turned up in the awful "Trog", outacting star Joan Crawford. I spotted a spacesuit backpack in a Jon Pertwee era Doctor Who episode. At least one spacesuit has survived and is being restored. Someone found the
space station miniature sitting in a vacant lot. Sadly, they were unable to rescue what was left of it.

Now, if somebody could just find Dave's spacesuit and the full size pod from 2010. Director Peter Hyams apparently has a Hal faceplate!