https://odysseyclube.com/loja/index.php?route=product/product&path=66&product_id=87 - these are like the VP cases used in Canada and Europe.
Packrat plans on selling these, but I'm waiting on a shipment from Brazil (like any mail these days, it is taking a long time).
I personally have been using these for a few years now. Not perfect, but they O2 games fit. https://www.customgamecases.com/online-store/Super-Nintendo-Entertainment-System-Super-Famicom-SNES-SFC-Blank-Game-Case-p132320262