These things are cool. They have engine mock ups made in a similar fashion. If I was doing engine/trans swaps on a regular basis, I'd say they are 100% worth the investment. Honestly, it is probably fairly easy to duplicate if you know CAD. Just snap a of the sides and top and trace the profile. Section it out and have sendcutsend work their magic. Or you could do it even cheaper with plywood and a jigsaw!