The Spedal CL871 is a great affordable screen for your motorcycle. But the 600 nits struggles a little in daylight. This sun shade is modelled to fit the contour of the unit. It fits pretty true but, if you ride a thumper like me, you might want to add a little double-sided tape to keep it from vibrating off.
I printed in PET-GF. Use what is suitable for your environment. Printed flat on the long back angled side. Depending on your machine the rounded sides can turn out a bit rough, so use supports and change orientation as needed by your supports/filament.