I gave away a Calla Lily cut file a while back that seemed to be pretty popular. Alicia from Mishaps Happen used the file and matted it with rectangles with rounded corners. I like it so much I decided to alter the files some to include a rounded corner option.
Of course, if you missed the files the first time around, you can still get the original version. ( They are included in the files.)
The files for the Calla Lilies are available in my Etsy shop.