4 tracks to id exact versions

[Hedgehog92]

Hi there again!
I have another few interesting requests for all, who want to help. This time I know some information about all tracks, but I can't find exactly the same versions of them, as on old tapes. Hope, you'll get it. So:

1. ID'd!!! Boney M - Megamix 1988. Thanks, twiceage!
3. ID'd!!! James Last - La Sorella

2. Laserdance - Cosmo Tron (sounds like 'remix' version from "Discovery Trip" CD, but features additional keys and bass lines in the beginning *and, maybe, later*)
4. Alla Pugachyova (Алла Пугачёва) - Mary (acoustic version of russian song, no lyrics) [full track attached]

Many-many thanks! :)

[twiceage]

1 = Boney M. - Megamix (Vinyl) at Discogs (http://www.discogs.com/Boney-M-Megamix/release/1748810) (Edited Version)
2 is maybe Laserdance - Cosmo Tron at Discogs (http://www.discogs.com/Laserdance-Cosmo-Tron/master/62260) (Vocoder Version)

[Hedgehog92]

Thank you, twiceage, Boney M and their "Megamix" are found! :)
But not "Cosmo Tron" Vocoder Version yet... I can't find any audio of this track in the i-net :(

[Hedgehog92]

A little more info about 3d track, 'Strip Tease In Rhythm', this tune is also known as "La Mattchiche" (Or "La Sorella"). Hope, it will help us in our search.

UPD: I FOUND IT!!!
James Last - La Sorella!
Only 2 tracks left to ID :))

[Hedgehog92]

No more suggestions?
That's a pity. :(

Here I made a little stereo-comparsion for a #2 request:


2. Laserdance - Cosmo Tron (sounds like 'remix' version from "Discovery Trip" CD, but features additional keys and bass lines in the beginning *and, maybe, later*)
In attached file one channel features CD version track, and other features cassete record, with corrected speed and pitch level. You can hear additional synts in some places of this fragment.
Hope, it will help you, but not confuse :)