So yes, Jurassic Outpost has posted some concept art from JP franchise designer John Bell, among which are a couple of vehicles from an early version of JP3 (presumably the draft of the script they threw out five weeks before filming):
https://www.jurassicoutpost.com/jurassic-parks-art-director-john-bell-posts-unseen-art-including-jurassic-park-3
There was some speculation for a while that the Grant with Raptor/Motorcycle Hasbro set was based on something from an early draft, so this would seem to confirm that:
No matter what issues the original JP3 script supposedly had, I'm sorry but that story had to be better than no story at all.
In the immortal words of many a SW fan, "I blame Kathleen Kennedy for this!" (And Joe).