If it has a different name, this is what i'm talking about anyway >

All the little black plugs (Pictured

I tried (strategically) pulling the grill off as not to brake anything else but i snapped the remaining two, it's stuck on with duct tape now haha.
Where would i be able to find these little plugs?,
do most libs or subes have the same kinda plug?
Ps: while the Grill is off, i'm thinking of spraying the grey area black...?
Cheers,