I’ve already reproduced and 3D modeled the mounting plate, which is the most exacting part of the arm assembly - where the arm connects with to the machine. I’ve 3d printed it multiple times and confirmed that it fits perfect - it could be easily machined and may just have to be my first foray into aluminum machining.
I’m also working on a RAM-style mounting plate for the monitor, which may provide a more stable interface for the touchscreen over the current arm.