Not ambient, but good:
Jim Guthrie is one of my favorite indie rock musicians. He's done some creative stuff, including scoring the soundtrack for a pretty fun iOS game called Sword & Sworcery. One of his better albums, Now, More Than Ever
, was recently remastered and Gurthrie has released a digital version on bandcamp for the low, low prices of "pay what you want."
I encourage folks to give it a spin and/or a buy. It is truly great stuff. Rock-opera style in some places.https://jimguthrie.bandcamp.com/releases