I couldn't find a single bed mount for the Creality CR10S5 with the new aluminum mount under the bed, so I remixed one of RaffoSan's parts to make it work!
The holes are 4mm in diameter, but you can modify them if you need to use larger or smaller screws.
This also includes the double economy TNut that slides into the aluminum frame. You'll have to melt metal nuts into the two holes on the TNut so that they stay put while you insert the screws. You can do this by heating the nuts with a lighter or, preferably, holding the tip of a soldering iron to the nuts while they are resting on the TNut.
Check out the pictures for more details, and do let me know if you have any feedback! Not sure if I'll have much time to do any more work on this though.
Hope this helps somebody out.
I took one of RaffoSan's parts and appended an appropriate mount for the CR10S5 aluminum mount.