Candyman is oldschool, he'll be old and grey before he goes lipo
If the magnet is shot, chances are the windings may be a little bit toasted too- open her up and take a peak inside (it'll smell like an ashtray if the insulation on the windings is done for).
If by some miracle the windings are still okay, then a new rotor would be worth while.
Curious as to the esc settings you were using that cooked the PLett- timing, punch and start power can make a big difference to the temps...