You may check with MCW Finishes, they were working on producing a resin 74 Trans Am model. I believe it is based on the current MPC 77/78 kit. If so you could use the resin nose, bumper, shaker and hood with a donor MPC kit. You could message them and see of this is feasible. Here is a link to their site:https://mcwfinishes.com/Mark
I found this MPC kit online, but good luck finding one for sale. Looks like it would come with almost everything but the hood. https://www.scalemates.com/kits/mpc-1-7515-1975-firebird--1152902