Source/product identity of “spines” in Dragon Empress promos?

Cowrie

I was just looking through the promos for the Dragon Empress for G8F, and I saw these back spines on a couple of the promos that would be perfect for a project I’m working on, but despite the fact that they seem to match the Dragon Empress outfit in those promos, no such spines appear in any of the promos for the outfit or its addon, and I can’t find the spines listed anywhere in the contents any of the products in the Dragon Empress bundle. Here are the two promo images they appear in, for reference:

So, does anyone have any clue where the back spines in these images come from?

SPew

I Have these spines in my library. They were a free download given out when the the outfit first came out, but i'm afraid that I can't remember exactly where I downloaded them from.

Cowrie

Hmm.  Can you tell me what they're called, at least?  If they're still available anywhere, that might help me find them.

WendyLuvsCatz

SPew said:

I Have these spines in my library. They were a free download given out when the the outfit first came out, but i'm afraid that I can't remember exactly where I downloaded them from.

Arki's DeviantArt page probably 

SPew

In my library they're listed as DE Spines.

WendyLuvsCatz

https://www.deviantart.com/aarki/art/Dragon-Empress-Spines-Freebie-803681586

SPew

Found it. https://www.deviantart.com/aarki/art/Dragon-Empress-Spines-Freebie-803681586

Cowrie

Thanks, both of you!