dress for a wedding

I have a formal wedding to go to but haven't really found anything
that's struck my fancy RTW wise, so I'm thinking of making something
to wear instead. As much as I like the style of the bottom of the
simplicity dress # 5671, the entire dress is a bit too prom for my
tastes. So I want to make a bottom that looks something like that,
less tulley though; actually it's the gathering on the side that I
really like. Do any of you have an ideas on how to reproduce that look
in a separate skirt? Anyone come across a similar pattern that I could
possibly alter?

Much appreciated.