U should be able to find third party charger:
PLUG must be the same (physically fit), and same polarity.
Volts, within +/- 0.5 of original.
Amperage equal to original or larger.
So if original says 19v DC 3 amps, anything that says 18.5 to 19.5 volts and 3.5 amp, 4 amp, 5 amps fine.