I'am and yes, no factory accessory available as of now. But, I will keep an eye out in the future.
3/4" inch plywood, circular saw, a drill, simply make your own box.
Taking both of the kiddos to test drive today so we should get some "real world experience" soon enough. The issue for my youngest will be the in and out during the winter month when the car is usually covered is slush and road salt, since his preferred method of entry sometimes involves using 4 points of contact which means both hands are filthy and probably his knees too. He's also a bit on the smaller side for his age but is crazy independent and has fits if you try to help him in or out as he wants to do it by himself. Having the running boards means he's got a place to put his feet and can pull up on the door & seat to get in without getting dirty, and allows him the independence he wants. Obviously one of the parental units is also always close by to provide a little push up if he needs it
We've got a couple of steps that we constructed for at home, but typically don't have something when we're moving around
Make a simple little box, put a cabinet door handle on it for ease of picking up. Just something maybe 8" square on top, about 3" tall. One step up to help people get in and out.
