Jeep did something like it once ... since a conversion kit would just be a set of parts to apply to an already certified model. And since the market is probably a small group of die-hards, a ...

That seems to have been the idea behind [agepbiz]’s 1:64 scale micro Jeep model kit that serves as an “overcomplicated” business card. Complete with box and labels in a shrink-wrapped package.