Interesting project, nice to see something different evolving and I love the upholstery on that bench seat.
Mattel also used some of Roth's designs (or inspired by) for their late 60's 'Hot Wheels' cars -
For my 7th birthday my sister gave me a loop-the-loop set which came with two cars: a conventional, 'custom' sedan and a 'Beatnick Bandit' in purple 'flake.
The Bandit had far more of an impact on me as I can still remember it five decades later while I don't remember which one exactly the other car was, even after going through the pictures. The set's long been in landfill now, but here's an image of one from google, which bears more than a passing resemblance to Agent Thor -
Keep up the good work!