Can you show us a photo of the milk type? ThanksI just cut one from plastic milk jug plastic with an xacto knife and a circle template. Has worked great so far and only cost a little time. To cover the speaker hole shrink tubing works great! You might have to check out the electronics supply sites. I lucked out they had large sizes up to 3" I think Harbor Freight sells rolls of it that would work. Doesn't leave any residue so shouldn't cause any warranty issues!
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