Power PC port of a JUCE App

I would like to target Power PC for a open source JUCE App.

I would like to know where I can find older versions of JUCE to try if the port can be achieved.

I have seen post from 2004 so I guess there should be Panther, Tiger, Leopard and Snow Leopard versions.

Also, what are the biggest challenges in backporting back to older JUCE versions.

Thanks in advance.

You can try to download tagged versions here …

IMHO the most challenging is not the backport, it is the maintenance of the software.
You will need to fix (backport) all the bug into JUCE without any help.
I don’t think a lots of people want to spend time to support Power PC.
The question is why to target Power PC nowadays.
I’m sure you have a valid reason, but you will have some hard time to convince people.