This is Different Dimension Out Of Space Convertible:
a whole lot of wondering about the name of this polish back when I first got it in 2014, and what I came up with is that it's evidently an alternate lyric to "Santa Baby" - which is also the name of the collection it was from or I never would have figured that out.) It's sort of a similar polish to Holiday Spirit, but it has a darker base and somewhat brighter glitter. It's a cool polish but it doesn't scream "Christmas" at you.
Re availability: probably not available. I poked around on Different Dimension's website, and while she has a ton of stuff I'd love to buy, none of it was this. Knowing me, I bought it on clearance in the first place.