Never satisfied with the universal version, I customized ps915's unit to better fit my needs. This was one of my first early on remix files so it may seem a bit primitive, sorry.
Works nicely to mount on the far left (when facing machine) using two M3 nut/bolts of your liking. Angle should work for aiming your C270/C290 or similar Logitech camera down at the work area. Enjoy!
You will need to use supports no matter how you orient the piece. Again I could have probably designed this without need for supports, but wanted to keep it clean and thin. Also be aware that the screw that goes through the camera is a bit of a friction fit, but this is nice as it removes the need for a nut at the other end, yet still keeps it all snug together. Questions? Let me know!
Autodesk 123D Design
Modified STL in Autodesk 123D. Included the 123dx file for your enjoyment.