Solaris 8 available for download?
Solution 1:
Solaris 8 was last shipped on February 16, 2007. You can only get patches for it until end of march 2012 after which it will reach its end of service life.
Solution 2:
You would need a valid developer account and/or maintenance agreement with Oracle. I do not believe those are free.
Solution 3:
Solaris 8 was only released for the SPARC architecture. Your best bet is to contact Oracle and see if they will sell you any CDs. You should be able to pick up a SPARC machine capable of running Solaris 8 on the second user market. For software package etc there is always sunfreeware.com.