If you don't find a charitable cause you can have a little fun and upgrade a fellow FTer.. I did this a couple years ago with an expiring SWU. When I did it I just posted in coupon connection that I had one expiring in a couple days and wanted nothing in return and I had a taker within 15 minutes.
Have a little fun with it if you like.. do a contest or something.. trivia, poetry, comedy, best BS story of why someone is most deserving of the upgrade, etc etc. You could even do it in this main forum and not in CC if you're not looking for anything in return.