Since these don't seem to really exist on the market yet, I'm also considering refining the design and possibly collaborating with someone to mass produce and sell these docks. I refined the design so they are simple as possible to make, and can post a tutorial if people are interested.
Here are the products I used. Total cost under $50:
DigiYes® USB POWERQI Qi Wireless Charger
10 Neodymium Magnets 1/2 x 1/8 inch Disc N48
Aduro U-GRIP PLUS Universal Car Mount
So far I have made three mounts while experimenting with the fabrication process. The first one actually used a peanut butter jar lid and 10 magnets to hold my phone without any support (no pictures of this one). It was functional, but ugly as sin. Subsequent mounts I used the original casing from the charging coil, and simplified the process and cost/strength of magnets by adding a base support. Here are the results:
Not bad for a little bit of drilling and super glue (which I always make a mess of). Because of the way I came across parts, I only used a single "grip" as the base for resting the phone, however using both grips for a wider base might feel better when docking the phone. It's also possible to use even stronger N52 magnets and skip the base altogether, to give your phone the effect of "floating" on the dock.
The drilled holes are 1/2" and have to be close together as possible (without overlapping) in order to fit 4 magnets between the interior screws that hold the charging coil in place (inside the case, not visible). I used a rusty spade bit which was terrible and had a bad habit of tearing off more than it should. To make the mount look as clean as possible, I'd recommend using a more clean cutting bit, maybe something like this which will grind through the plastic without catching or tearing.
Well anyway I hope you guys like it and show some interest. If you have any further questions, please let me know. Thank you for reading!