SenseCAP Outdoor Enclosure

Does SeeedStudio separately sell the “Waterproof Silicone Plug” that blocks the N-type hole for the SenseCAP Outdoor Enclosure?

Alternatively, does anyone know the part number of this component?

I’m using this case for a different purpose and need to block off the third N-type hole.

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https://www.seeedstudio.com/SenseCAP-Outdoor-Enclosure-p-5353.html