I needed a little Extra track for my under cabinet LED strip lighting for a reno i was doing. So i made a printable copy of the aluminium track I had. It adapts perfectly, I also printed some extra clips to hold it in place. Better Photos on Reddit:
Details:
Track is 17mm W x 7.8 H x (however long you want to make it).
Clips: Designed for 4 x 1/2 (3mm x 12mm) flat socket screw
The Clip is designed to attach track to different objects or surfaces. It also can join track together to make an extension.
If you would like the fusion files feel free to reach out.