looks like your out of luck.
My Gear:
Fender Custom Shop Time Machine 1956 relic
plus accessories
Your position and your relationship with music has to be one from the inside. - John Frusciante
and yes, my avatar is weezy, what?
those are pretty weird looking, dont think i've ever seen anything like those before. here's another pic i found of it, its a little closer view of the covers.

i used to be a mod, then i took an arrow in the knee.
Do you have one cover? Maybe see if someone can make you one for a decent price.
I don't give a shit if you listen to me or not
Have you tried to contact Aria Guitars? They may be able to find those replacement parts. I read an article that said Aria made those guitars for Epiphone in Japan.
I do have one cover, and yes it is a strange guitar, and it has pearl logoing on the pickguard and headstock (which seems weird to me for Epi solids in the 70's, and even more so that most I have found online do not), and yes I will check Aria.

Thanks Fellas