iOS Icons for SparkReel

We already have our logo designed, and now need an iOS icon created that can be resized to the following dimensions: 57 x 57 pixels 114 x 114 pixels 72 x 72 pixels 144 x 144 pixels We want the icon to have the "S" with the spark above it from our logo, similar to this Twitter avatar ([login to view URL]). Assets are attached.