That's almost what i'm looking for except for the alien aspects. In my researches, i found something like this coukl works : http://ogresound.bandcamp.com/album/195 but it doesn't have to be exactly like it.
I am really interested into finding a musician for my game who can match perfectly the mood. If you wanna work with me, i would like to know what are your conditions and when you are able to start working on this and what's your porduction pace. To be honest, i hope to release the game end september. If it sounds workable, maybe send me an email at contact[at]visumeca.com to discuss (or on a discord or something else).