Specialty Gardening: Flower suggestions needed, 1 by Gwendalou

Gwendalou wrote:
The deal is there's a bride that wants this exact bouquet. This is actually a teleflora ad, but of course, they don't actually sell this bouquet they've so conveniently pictured in their ad. And once a bride sees something like this, you know she is determined to have it.

I'm looking for a filler flower to replace what's shown here. They're manipulated a lilac but we all know lilacs don't grow exactly like this, at least none that I've seen.

Can you think of any other filler flower that would be this purple color and still give an open and airy look to the bouquet. I don't think wax flower is going to work exactly as she wants.