I managed to find the latest version of Rasmol at the Imperial
College archive site. Try going for the following
gopher://sunsite.doc.ic.ac.uk:70/1/biology/biocomputing/moleculear/rasmol
and you should find both the UNIX .tar file (which I succeeded in
decompressing and compiling) and the .zip versions of RasMol and RasWin.
I'm sure it can be found at other archive sites.
Best Regards,
Alan Mills at Birkbeck