I don't. But it seems to me that solutions must exist.
For example: Mandate that all districts must be rectangular, except those on state borders.
Mandate that the populations of each rectangle be "roughly" equal, so far as possible with rectangular districts, and that the areas of districts be "roughly" equal. One can even contemplate that an upper and lower bound on the aspect ratio of the rectangles could be stated.
In other words, abandon the ability to shape districts any-which-way, and also abandon the fixation on equal numbers.
What's wrong with that?
--Boris