I got this gun case at Rural King for $43. It has two layers of perforated foam so you can tear little squares out. I made it fit: the Mavic, 2 spare batteries, the RC without having to take my tablet or adapter off and my ND filter case.
Now I need to figure out how to "glue" the two layers together so the top doesn't lift when pulling stuff out.. I'm trying fabric glue right now... I know, it's petty, but it's almost perfect