This is an adapter I made to hold my Pinecil v2 in a cheap stand I bought on amazon. I added a hall effect to my Pinecil so one version has a holder for a magnet. It has holes that you could use screws to attach the holder to the stand but I just used some hot glue. I also designed some bumps instead of holes to attach it but never tested. I also put a shot of hot glue on the back just to keep the holder from wobbling in the stand as it didn't have a very snug fit.
If you want to try out the bumps you can edit the model on onshape by suppressing the folder called holes and unsupress the bumps one. If you try it out please let me know how it worked for you.
Designed in onshape
https://cad.onshape.com/documents/3dfc7c7aedd91457dff1711c/w/25ca9f2346cf8ca5d709bd6d/e/eb03a9dc8fc947782fcb098b?renderMode=0&uiState=675ef77cbe4315572f9209d6
The author marked this model as their own original creation.