H Con

Hi. I'm trying to repair a song, more specifically, this song , and even more specifically, fixing the weird noise around 1'20''800'''. Because the faulty part of the song is in a part which repeats four times during the song, I've considered overwriting the part with one that is "pristine". However, I have no idea how to select those exact parts. Are there any tools or secret pro tricks for doing this, or is it mostly trial and error?