(If you make one, please upload a make! it is very much appreciated! Thank You.)
Mount using something like Scotch Extreme Mounting Tape.
These are some mounts I made to attach my iPad Air to my fridge!
I wanted something minimalistic that would hold it securely.
At first i was scared to attach it with just these tabs & some Scotch Extreme Mounting tape,
but after putting it up I am extremely happy with the result & the iPad is not going anywhere! It's held in place very strongly & allows me to slide my iPad out the top if i want to remove it for some reason.
These were modeled to be exactly the dimensions of the iPad, so depending on your printer you might need to scale them up a tiny bit. I personally printed mine at 100% scale & they fit very snugly. I was happy with the result, so I did not bother to scale mine up.
I suggest printing with the large side facing either down or up (to get the nice rounded edges) & use plenty of supports, remember, its a snug fit! or just print it however you want, its your print! ;)