Ultra pro has some thick 1/2 and 1 inch lucite brick screwdowns with UV protection. Maybe add a little silicone caulking to the seams for full weatherproofing?
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Trading! See my Flickr "For Trade" album (updated Dec 2023) as well as an album of my PC stuff.
https://www.flickr.com/photos/197267578@N07/albums
If you want a card, you might not get a deal. If you want a deal, you might not get a card.