This type of enclosure is built around Ti SensorTag LPSTK-CC1352R development kit.

3D print two STL files from this folder: Sleeve and Wall. You may pick some printing advisories on my Thingiverse page.
If you are unable to print the parts by yourself - you may consider to find an appropriate local 3D service provider and place an order with assistance of Treatstock or 3DHubs portals.

Both regular and OLED faceplates for the enclosure has been borrowed from SoftRF Prime MkII case. Use Face and OLED Front STL files from that folder.