That's odd, because I've seen the footage of Ali saying this. It couldn't be that hard to find. Note, though, that those words, like most of Ali's "political" rants, were actually conceived by Malcolm X. Ali was just his little puppet. So, in a way, Ali didn't really say it.
Yes. The McClellan Hearns sparring was broadcast earlier this year, on one of the "Live From Kronk Gym" broadcasts. It's worth seeing, though nothing spectacular except for the fact of who was actually sparring. Sadly, I tried to record that broadcast, but something went wrong with my computer. It's probably on YouTube, but under some "Kronk" title, not the names of the fighters.