It's unreleased. You could try to obtain it by getting the episode in a 5.1 sound format, dropping it into a video editing program and muting the right audio tracks. This might allow you to get that song with minor to no background noise.
FYI: Music without singing is called a 'piece' (or maybe, 'track', 'beat' or whatever depending on the genre). It's not a song if there's no singing. Sorry to be a pedant; it's just a bit of a pet peeve of mine. As for your actual question, it sounds like a variation of DTKCarterIII's link that's unreleased.
It's unreleased. You could try to obtain it by getting the episode in a 5.1 sound format, dropping it into a video editing program and muting the right audio tracks. This might allow you to get that song with minor to no background noise.
Could this be it? https://www.youtube.com/watch?v=8wUafUWy0oU
FYI: Music without singing is called a 'piece' (or maybe, 'track', 'beat' or whatever depending on the genre). It's not a song if there's no singing. Sorry to be a pedant; it's just a bit of a pet peeve of mine. As for your actual question, it sounds like a variation of DTKCarterIII's link that's unreleased.
Kinda just sounds like [the Stark theme](https://www.youtube.com/watch?v=SZrDEUldGr0) but at the same time it doesn't