I had the exact same issue when mine took dirt bath.. If you have access to CF tape... lay some on the top of the spars (top and bottom of wing... ) you can adhere it with CA and using wax paper over your finger spread it wth some pressure. CF should be approx 2-3 inches each side of the break. You can thin down the spar the hieght of the tape which is only 1/16 of an inch or so
Mike