If you are handy with repairs, just snip off the connectors and solder the leads, and insulate the joints to get the fan working again.
If you need an off-the-shelf fan, then pick any 140mm fan with 50 to 60CFM capacity.
Another option is to just ask Thermaltake about the capacity and specs of the fan. (They may not be happy about your self servicing).
You should be getting ready to watch the World Cup game now, not mess with PSUs! Good luck!