This probably won't help you much, but I haven't been impressed with any silk flowers I have seen. Perhaps because I wanted them to look as real as possible. Like I was saying about the lily of the valley...I found a place online that said that they had realistic lily of the valley...yeah right, they still looked fake. I went to a couple of places, and yuck. I found orchids that looked ok, but I think the problem you might have with any silks will be be fraying on the edges.
Perhaps someone who has used silks can help you out?