New compatible chargers can be found at very reasonable prices on ebay. Possibly also second hand original ones.
Here in the UK I just bought a new compatible one for under £6
Sort by p + p ascending.
Make sure the wattage is the same, or better still, greater.
Cooling is a problem with many devices (such as these), thus I add stick-on rubber feet underneath to raise, and make sure it is on hard surface.
Good Luck - Keep us posted.