I may be a little late to the party since MTH has (or will soon) discontinue the DCS Remote (as of Apr 2022). But there are millions(?) of them out there and I've only seen one other holder which is made much differently than mine (you can find it at https://www.thingiverse.com/thing:1708424).

This one is pretty simple. It has three flat head screw holes to attach it to your layout or table.

No adjustments needed. Print it in the color you want or paint it.

On my Prusa i3 MK2, I used supports for the parts of the holder where it was needed. You may be able to get away without supports.

I've included the OpenSCAD code, the STL file and the GCODE file for the MK2. You may have to slice it for your printer. You can also submit the STL file to any of the 3D print web sites.

I could have done this in Fusion 360 and it would have looked much better but it would have taken 10 times as long to get an STL file.