[Buzz]

West Coast Cobra I believe used a semi-monocoque chassis that was quite robust including solid side impact protection in the doors. I don't think they're still in production but there are quite a few of them out there. The issue with them is that they took significant liberties with the size, shape and proportions of the Cobra body so in addition to being substantially bigger and heavier than the more true-to-original replicas, they stand out starkly when compared to other brands.
I was very familiar with the Pace product when they were just getting started and a lot of race car experience and engineering went into that chassis design; plus they also put a lot of thought into the look, shape and stance of the body. All in all - if you don't insist on having a traditional round tube, ladder style chassis, Pace built (builds?) one of the most impressive Cobra replicas on the planet.