mellow dragon
A chiral (mirrored) flip of say, the Kang intake regulator would be nice, as well as perhaps a straight version thereof, and so on - in general, it'd be cool if there were a lot more components with the same function but different tetris block shapes, and different efficiencies; it'd add a lot of flavor, and make packing your interplanetary cube with stuff a lot more fun.
regal shore
clever lichen