Here is a link to some new rulers my sister and I each bought today at the sewing expo here in Michigan:
http://suepellanddesigns.com/shop/category/tools/
These I could see great for making scallops as well as leaves, stems, ribbon (that is ribbon for applique) flowers. I makes something that looks like chain links. We got the three ruler. I can't wait to use it. I have been looking for some things like this.