Another AMS drybox remix to suit the hygrometer pictured. I wanted one without batteries.
I got it from eBay at this link
https://www.ebay.com.au/itm/374979102723?mkcid=16&mkevt=1&mkrid=705-154756-20017-0&ssspo=mf9llgovsj6&sssrc=2047675&ssuid=uXJ7qN2tSEu&widget_ver=artemis&media=COPY
The dimensions of the slot that holds the hygrometer is 45mm in diameter and 16mm thick.
Print with supports, they popped out super easy.