Hi,
as you might probably know, NeXTstep was originally developed on Sun 68030-based hardware (i.e., Sun 3/80 workstations). This posting (
http://groups.google.com/group/comp.sys.next.marketplace/browse_thread/thread/843f092e8b3aad16/8e9823c1f299ac20?lnk=st&q=%22nextstep+0.9%22&rnum=12&hl=en#8e9823c1f299ac20) seems to mislabel the development machine as Sun 386 (there was a Sun 386i machine - I have one here - but this was really 80386-based and running SunOS 4.0.x) instead of 3/80, but it mentions that the NeXTstep version running on this machine was 0.6.
I also have a Sun 3/80 here (too many computers... ;-)) and would really love to get hold of that pre-release version of NeXTstep. But I suppose this will be really hard to find?
I wonder if apple even has copies of the code that old. Although I suspect it would look a lot like lites.
I guess you could always try to write the old NeXT software people for any info they have......