UK
AmbientLive is not so much a label as a series of events throughout europe. Every event has it's own compilation cd-r with tracks from the performing artists/dj's.
The website http://www.ambientlive.com appears to be dead so the contact address info@ambientlive.com is likely to be out of commission as well. The label can be contacted through the BandCamp page, apparently.
Across 23 tagged in-scope masters