This is a Stream Deck mount I made for my Foxx Mount, however it should fit on any 10 series aluminum extrusions.

https://foxxmount.com/

It fits perfectly at the top of my throttle mount and is angled at 50 degrees to make it a bit more comfortable and easy to see. I used the standard 1/4" screws and anchors that came with the Foxx mount (black screws in my case). Do note that because I didn't account for proper tolerance, I had to screw in and back out the screw a couple times to make sure it could mostly freely spin in the mount. If the screw can't have some room to move, you'll find that you just screw into the material and aren't tightening the nut. Also note that because of the angle, I found it easiest to slide this in the top of the mount, then screw the engraved plate back on. You'll have to screw the bolts in by hand at first, as there won't be room to get an hex key in until it's almost all the way in. Future revisions will probably include holes specifically for tightening those bolts.

The flat part of the stand (where the device rests) is ~0.6", so really anything thinner than that would fit just fine. I've tested a phone, keyboard, and laptop (Lenovo Yoga) and they all fit and were stable. This part is intended for a Stream Deck, but use it for whatever you'd like!

I've also added a file that is just a stand and doesn't require a mount. I have not printed it myself, but it should work fine, as I pulled the dimensions from the stock Stream Deck stand.