@sirenwerks,
Definitely has my attention and worth watching! I, too, would also love to see a production model of the former SAL Sun Lounge cars! But, I can't seem to get anyone to offer high-quality SAL, ACL, and/or SCL passenger cars (heavyweight or lightweight) in plastic.
@Shipsure has stated that those roads won't sell well for MTL, so even heavyweights from them are unlikely.

That Shapeways model is pricey, though, and the designer says an interior and underbody details are planned, which is only going to raise the price even more. I'm not sure that I could build that model up nicely with my skills, considering a floor has to be built and those windows need to be made to be flush.

Thanks,
DFF