Broken overhead rear seatbelt indicator housing

Hopefully someone can help - I recently noticed the overhead interior light unit that sit in the roof lining near the rear view mirror was rattling, so I thought I'd investigate, but unfortunately the plastic ws so brittle it broke into lots of little pieces whilst trying to remove it. I bought a replacement unit on eBay, but the piece that holds the indicator unit for the rear seat belts was different, in that there was no hole cut in it (see pictures, attached). The part itself is in better condition than my original one - as shown, two of the screw hole pieces have broken off, as have the retaining tabs. I can't seem to find one of these online (except in Russia). The part number on the one with the viewing hole says GS1D-69979, whereas the one that came on the replacement unit is DF80-69979.

Does anyone know if these are available anywhere - I'd Imagine Mazda don't sell them anymore? If I can't get one anywhere, are there places that will professionally cut a viewing hole in the one that is in better condition / could this be done as a DIY job without it looking awful - perhaps using a dremel or similar?


New photo · Wednesday, Jan 28 📸

New photo · Wednesday, Jan 28 📸
 
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