Pasha Hristova savagely remixed

A few years ago I heard a fantastic disco song from Bulgaria. It was from Pasha Hristova, a local star in the 1970s who died in a tragic plane crash. I really loved it but couldn't play it in my DJ sets because the beat was not clear enough for modern standards, so I decided to make my own remix.
I started by pitching the whole think of half a tone to make it more dramatic and speed it up a bit, then I cut all the measures and glued them one by one on a beat. In the 70s in Bulgaria they didn't use computer for music and the tempo was following the mood of the chef d'orchestre or the diva, not the bleep of a machine.
Then I separated the low frequencies, the medium and the highest frequencies. I compressed the basses, and created a fake stereo effect for the mediums, and even more for the highest frequencies. Then I added some extra sounds, an acid loop (acid always works fine on stuff like that).
At the end I worked on some extracts if the introduction and added some fake orchestra to make it sound as real as possible, to conclude the song properly.



Now I'd like to know if anyone knows how to contact the owner of the recordings to see if we could release it legally. You know the email addres...