I don't know if anyone's thought of this before (a search didn't find anything), but I had some spare plexiglass lying around and also some sticky-backed velcro tape. In five minutes I had...
a see-through, vertically adjustable cover plate.
I put the hard 'hook' side on the saw and the softer 'loop' side on the plate
It was so quick and easy, I made one for use with the splinter-guard...
...and one for without.
The plates are adjustable and can be used when the saw is tilted for an angle cut - unlike the $48 factory version.
Too simple and easy and handy not to share. Enjoy.