Top half: https://www.dropbox.com/s/4u7l6vli3v3vfgl/npi4v2a.stl
Bottom half: https://www.dropbox.com/s/w2852em6197lw7b/npi4v2b.stl
Additional components needed: NanoPi Neo4, the huge heatsink (looks like a brick), and this set of M3 extenders: https://www.amazon.com/dp/B07BRK411L.

Case picture: https://www.dropbox.com/s/onekg1pmvnnhe15/casepic.png