Update March 3, 2024:
The discs at this link are 2mm (original ones I posted are just over 3mm) and should not stick out as far. I have not tried these since mine fit just fine in my AMS. If anyone else does, please let me know how they work.
https://www.amazon.com/FINGERINSPIRE-Miniature-Miniatures-Halloween-Christmas/dp/B0BND72RBX
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I used cylindrical parts and negative parts to add the thru hole, ledge and extra material around the outside.
I used these acrylic discs, they stick out a bit but still fit easily in my stock AMS, thinner discs are also available on Amazon.
https://www.amazon.com/dp/B078PJ757Q?th=1
Printed with 0.4mm nozzle, 0.2mm layer height. I used ABS (had an old spool lying around) so I can toss the holders in my dryer when the desiccant turns green.
The author remixed this model.
I used part and negative parts to create an opening with a ledge for a one inch acrylic disc to act as a clear viewing port to see desiccant color.