Nice work. I have the same kit, just haven't gotten around to it.
It was from 'New World Miniatures' and sculpted by special effects legend John Rosengrant. Had the pleasure of meeting and chatting with John a few times at some SCAHMS shows; a pleasant, friendly person and an amazingly talented person. When you see just the legs of the velociraptor in the kitchen during 'Jurassic Park', that's John. In the book about the late, great Stan Winston, there's a great shot of John in the legs.
If I remember correctly, John and Chris Mrosko were the principals in 'New World Minatures'.