I cracked the front panel as well. A new lens cost twice as much as a whole new camera! Ugh.
So I took some microscope slides (they are cheap and really clear) and cut a piece off with a dremel tool. I needed to grind the edges a bit to make the perfect size. I then put this new window in place with a bead of silicone water proof sealant.
The result is not quite like new, but it works :-)