The new Carry Speed MagFilter System Polarizers for high end compact cameras that lack threaded filter mounts are officially available today. If you're not quite sure what this is, you can see an old article posted (here). If you're unsure whether it will fit your camera, you can download and print a template to test with your camera from the product page.
Or purchase direct from the CarrySpeed.com website from the MagFilter product page (Click Here)
Carry Speed MagFilter System - Polarizer