I think I can find Oracle 8i and/or Personal Oracle 8 in my legacy archive. But all old CD-s are in the office of my previous place of work.
If you are not in hurry I can look for them when I'll come there. If I found I'll upload them somewhere and write the link here.
Depends what he means by "test." The older media often had a statement like "feel free to install and evaluate for 30 days." But then again, that may all have been decremented, since the potential for abuse is obvious.