I dont know the brand, sorry. It is a 90s car seat I found at a fleamarket. There was a junk vendor that had a dozen car seats and I bought the one that was the closest to the right profile. I filled the gaps for where it mounted in a frame with craft foam and bondo. Painted it all Rustleum Purple Metallic.
The jaw was made out of a painters pan, a piece of hollow tubing, and a spring from an old screen door.