If either of those cars were available here I would be laughing. Seriously contemplating using the UVW map of a 3d model, get it laser cut and 'join the dots' (tack weld together). It isn't the conventional way of making them but I believe 0.7mm material or thereabouts would actually be workable enough to do the job.

If you're not sure what I mean; imagine the simple cardboard box in its 2dimensional form, a flat item that once folded and joined forms a 3d box. Same concept for this, except I won't be folding anything but joining.

Am I making sense?