Here is a simple hand rake. Gets into narrow places and under stuff easily.
You can print your own handle but I just used some 1/2inch diameter Acrylic, cut to 6 inches. I think the Acrylic is stronger than printing anyway. I would have used 1/2inch wood dowel if I had some lying around. I drilled thru the rod and used a screw/nut to assemble. But you could use wood or sheet metal screws.