Are you seeking a specific product, or tips on what to look for design-wise? I've done some research on designs, and this is what I've found, though I am building my own mount so I don't know specific products.
The Roof Rack is a common space to store MaxTrax on a wagon -- Traction Boards take up a lot of space but are very light, so a rack is an idea mount. As
@PonoAdventures said, they get pretty dirty so you don't want them inside or in with your other gear. If you are wanting to preserve real-estate on the rack itself, an offset mount is an option.
Flat Mount:
Offset Mount:
Another good mounting spot is over the rear quarter windows if that's an option for you. On an MDX it might not be without making holes, but on something like the Ram Truck above, it's easy to connect something to the bed rail and to the roof rack and mount traction boards there. On my first version of my truck cap, that's where I kept mine. This is actually a bit nicer than a roof rack in my opinion, because shorter folks can still easily access them. In the photo below you can see the red traction boards mounted to my bed rack.
There are a bunch of different types of mounts. I use threaded knobs from amazon and 5/8th inch threaded rods. The rods stick out from the rack and are just long enough so that the traction boards (which have holes in convenient places) can be held in place with the knobs. I'm preferring a no-knob solution because I keep dropping the knobs when I take the tracks on or off, and I don't want to lose one. Here's an example of a no-knob solution from EziAwn
There are also fully captive options that provide a bit more security which you might want if you've just dropped $800 on two pairs of MaxTrax, but they come with a trade-off in weight. I am unable to find a photo of these but basically, imagine the long edges of the max trax secured by angle iron, with a padlock at the end that allows you to flip up a portion of the angle and remove them.