This is a pretty one.
https://www.zazzle.com/rainbow_chris...08874589136419
or could this be the angels?
https://www.bing.com/images/search?v...x=0&ajaxhist=0
fatcatpatterns has an angel set that might be similar to what you want. It's almost at the bottom of the page. They are set straight in a quilt right now, but could easily by on a circular skirt.
http://www.fatcatpatterns.com/storefront.html
Here are all kind of applique angels. Probably most of them could be used on a Christmas Tree Skirt.
https://www.google.com/search?q=appl...w=1097&bih=619