Home depot. Plumbing hanger 1.29. You know the little stainless and black clamp you screw to to the stud and the PEX runs through the loop part. Bolt into place through the existing hole. Last forever. They look like this. This is a heavy PEX hanger. But this is the shape you want. Then a small bolt, two washers and a nut. You are done.
You just bend over the only ear to make a loop. This will naturally make the 90 angle. Bolt through both eyelets back with a washer both sides. Mount it at about 30 degrees toward the header. The cable will slide through the loop forever. You are insulated from fraying and IT WILL NOT BREAK.
