Any possibility to find an old copy of PS8 ?

Hi!

I own a licence of PS8 from many years ago.  However, I seem to have lost the physical CD and the licence number associated with it.  I wonder if anyone knows if it's possible to find a working copy somewhere, I think it was 8.5?  I work with computer geeks and I assume the old code will run in emulation mode somehow.

It was so simple to use, I just cannot get used to MS Project.  And MSP is currently crashing down on me in a critical phase of my work...

Thanks!