Well count me as someone who definitely remembers seeing some of these scenes in a specific version/release years ago. It definitely was not every scene, and I don't believe I saw a release with all of the supposed deleted scenes but there was a version I saw with some of them. The only reason I'm sure its not my memory playing tricks on me is because I remember noticing the differences when I was kid and went to a neighbors house to watch the movie there and noticed some gaps compared to the one I watched at home. I remember the death scene of the T-Rex was longer as he was sinking deeper under water and that ducky making faces to get it's attention was in the version I watched as well. There may have been some other smaller details but those are the two I definitely remember being different.

As far as the actual type of release though my memory is less clear, we didn't keep the tapes in the cases very well. I believe the retail version we had was a clamshell as opposed the cardboard sleeve for vhs and we may have also had one taped from tv. We also owned a betamax earlier so it's possible it was even on that format. Not sure if anyone on here has been able to confirm with the Betamax since its so rare and old.

Anyways hope some day that additional content is found / released.