If you told us your specific model number, I would have looked it up for you. "Inspiron 16" applies to many models. You need your model number, such as 5625, 7610, etc. You can check direct from Dell, if they have it for sale here. If Dell doesn't have it, the next most reliable place is Parts-People, which sells genuine Dell parts. You can also take the part number from Parts-People and search for it in your local market.
I lost my laptop charger and need a replacement but don't know what to order. i have a dell inspiron 16 Reg Model: P117E   Can you tell me which replacement charger I need?  
dell inspiron 16 laptop charger