Monoprice Select Mini X Support Panel (1/2 panels)

It makes sense, but the original is too big to print on the printer itself. I split it down the center of the fan on the theory (untested) that the fan would hold it together. Maybe put a seam of glue behind the seam to keep it from flapping.

If you try this before I do, please post your results.

Update: Printed in PETG and it worked GREAT. The pylon is a little wobbly because I have not put the fan on yet, but even without the fan it fits quite well.