That kit is a 1961 Rancharo and was re-released... what? Three years ago? The grill I illustrated is a '62 and not in the kit so good luck finding one. It was drawn for Gregg back when he was building a 1:1 and to my knowledge not possible in scale unless there is a resin grill and front fenders available somewhere. The premis was to cross a Shelby cobra (scoop and stripes) with the Rancharo and what would it look like. The front bumper is actually the real '61 piece but trimmed down by removal of the lower shield creating a straight "blade" much like the Mustang. Also note the rear wheel opening has been radiused and a lip added.
That gives me some more useful info. Once I get hold of a kit it should be very doable/ Will have to figure out something for the grill, if anything is possible.
Looking forward to the challenge!