Groove Collection:

I've also been into finding lost songs that Spotify won't make available in the US for whatever reason.

The original version of Mandolay, which radio stations in Vegas used to play in the mid 90's... but now you can't find it streaming anywhere even though it's the best version of the song.

The 1989 song "Downtown" by Norwegian group One 2 Many:

"Another Lover" by Giant Steps

There are others but I'll stop there.