I've got a 3d printer myself for about 3 months, so this should be a good challenge.
I did some measuring of the original block that is on the back of my NS2 for holding the music stand.
After some fiddling around in Tinkercad, I managed to create a working "prototype".
It even fits on the back of my NS2 where the original piece was.
One downside: I lost the hole for the music stand, but I'm not using that anyway.
Not sure if I keep the text StageTag, because it makes it a bit more obvious that there is some sort of tag inside

