While you mentioned "MSK SERIES" and "Sajid Ajmer," these often refer to specific YouTube channels or independent remixers who upload custom versions. For these specific unofficial remixes, you can often find them by searching the artist's name directly on SoundCloud or YouTube.
For the most reliable audio quality and legal access, you can use the following platforms: While you mentioned "MSK SERIES" and "Sajid Ajmer,"
Offers the Khaab (Remix Version) for streaming and mp3 download via their app. While you mentioned "MSK SERIES" and "Sajid Ajmer,"