Is there an old version of iRealPro that will work on a Power PC (G4) running OS 10.5.8?

Alternately, is there a version of iReal Book somewhere that would work on a PowerPC G4 running 10.5.8?

It's not so much for playing the MIDI files, but so I can deal with charts. It's a pain on my tiny Android phone screen, and that is my only other computer.

Unless there is a version of the software for Raspbian I could run on my Raspberry Pi ... but technically that is a question for another thread!

Thanks!