I don't think they can buy their way out of this.
There has been so many negative PR for them the last weeks that I believe nobody is going to trust them anymore.
Using funds they have they could buy cheap coin and sell on other exchanges thus creating enough capital to replace lost coins.
Once Gox was back up an running a savy investor could come in and turn Gox around.
they could use those frozen BTC in the gox from the moment they were frozen.
If they sold the frozen BTC on another exchange they wouldn't have any left on Gox to replace the frozen and lost BTC. This is not an option