I've got the spinner spiral from one of my E/E sheets that I can use and I can use another sheet, from Third Group Decals, from which I can use the "13" from. It's in two parts, white and black, I can always just use the white "13" decals and paint them with suitable green colour, right? Any idea what RLM it would be? Also, shape and size matches the pic in post #219, which seems to be a bit larger than the size shown in the profiles above....
So, I should have this one covered...! 8)