[Skunkworks] looking for an Original manufacturer HP 65W AC Power Adapter

i'm looking for a original manufacturer HP laptop Power Adapter for a HP Compaq nc6320 Notebook Input 100-240v 1.6A 50-60Hz output 18.5V 3.5A 65W The ones i find in the shops are generics which fray within a month of use....please assist me on the shops where i can get a good offer on the original ones