Upload & Sell: Off
If it's just the filter that's destroyed, I was able to VERY carefully cut the filter ring with a dremel tool or a small hacksaw type thing. Cover the glass, of course, shove a rag in there or something like that, but if you are able to get the ring cut it will come off very easily.
A buddy of mine dropped his nikon 70-200 and the same damage occurred. It was as good as new once I got the filter off.