Hi Maestroix,
I haven't a clue on the first one, though I believe they might actually be singing "unattainable", as opposed to unavailable.
As for the second, I would swear it is Lush, one of my all time favorite bands, from England -- though I have owned all their US released work and do not recognize it. There does appear to be something of a discernable accent to the vocals, though I'm not sure it is not in fact more French than British.
Sorry I can't be of any more help. Take care.
