Sapphira by Imagine does not need an omega kit as they have included Omega support native to the mesh.
Imagine has relocated their store to: http://maps.secondlife.com/secondlife/Gigli%20Waves/237/146/22
Sadly Imagine is not updating owners of earlier incarnations of the body for free, but several upgrades to the hud and the body scripts make it worthwhile to grab a demo of the new body if you want to check it out. I really like the ease of getting a curvier body without going extreme with this mesh,