Probably after originals but ...
Have you thought about making a couple for yourself? Not a really hard project:
https

/acousticalsolutions.com/diy-how-to-make-your-own-speaker-cover/
There are also a couple of YouTube vids I've come across which show how to assemble an easier frame I.e., cut straight lengths and simply cut a 45 degree angle on each end to join - this guy demonstrates but uses cloth which looks way too thick to me but you'll get the general idea:
https
/www.youtube.com/watch?v=igt1rRtgS18
