Does anybody make such a thing?
Best bet would be a unit with true variable speed ecm motor. It can overcome more static than most although motor will use more watts doing so.
With that said I'm not sure of any 2 stage package units that small. Although nordyne does have variable capacity package units that modulate much further than 70-75% capacity.
I think goodman and rheem have mobile home package units that are designed for small restrictive mobile home ducting, not sure if they have a 2 stage model or if that's what you're looking for.