I bought an electrical cord reel that did not have a guide. I saw other brands that had a guide (but other things I didn't want). I designed this one based on a close up picture of another.
I printed in ABS as it would live outdoors. I designed mount screw holes in case I needed them, but it worked OK (so far) with just super glue to stick the halves together.
The author marked this model as their own original creation.