Just stumbled over this one here:
https://archive.org/details/vim-5.3-openstep-intel (https://archive.org/details/vim-5.3-openstep-intel)
Vim 5.3 (1998) for NeXTSTEP / OpenStep 4.2 — Restored and Patched Edition (2025)
From the same uploader, a OpenStep 4.2 Virtualbox OVA
https://archive.org/details/openstep_ova (https://archive.org/details/openstep_ova)
There is an accompanying web page with more details about this OVA:
https://adminjitsu.com/posts/virtual-nextcube/ (https://adminjitsu.com/posts/virtual-nextcube/)