For use a mini router connected to the MeLE miniPC to control my astrophotography equipment I designed this 3D printed support for the mini router TP-LINK TL-MR3020 to mount it on an aluminum bar (mine has a cross section of 20.6 x 4.6 mm). You can modify the _L and _G parameters in Autodesk Fusion according to the dimensions of your aluminum bar.
If you want to mount the aluminum bar on which you attached the mini router, mini PC and even a Power Box on a Meade 8" F10 SCT telescope, you also have the supports for that.