Original 2015 version of the 6.7 mixtape — where can I find it?

I recently started listening to UK drill (after I moved to UK, haha), and I'm trying to go chronologically and retrospectively listen to all the important records. But I can't find the original 2015 version of the 6.7 mixtape anywhere. All I see is the 10th anniversary reissue.

As far as I know, the sound and beats have been changed?

How can I get the original recording? Can anyone share it or give me a clue? Thanks