The Cort AB590MF was first mentioned by
@screefer here
Guitar Scale Acoustic Basses
and again by @skycruiser here
Guitar Scale Acoustic Basses
with a brief discussion ensuing.
I miss when posts were indefinitely editable: that way you could have kept track of every new model and maintained an updated list of them in the OP...
The Mitchell EZB is already featured in this thread as well.
@Tim Skaggs started a thread about it
Mitchell EZB Super Short-Scale Acoustic-Electric Bass
and the discussion continued over here, starting from post #1052
Guitar Scale Acoustic Basses
and going on for a couple pages, with two or three close encounters of the first-hand kind.