TubeNet

I picked this up used and super cheap last year after the announcement that RT devices would not get Windows 10. That didn't bother me since the plan was to only use it for Netflix and youtube through the browser. I like it and use it a lot more than that but I think my charger is dead. It takes a pin charger and won't charge through the usb port.
Any ideas where I can get the right charger? I'm hesitant to try the generic ones I see on Amazon.

Nokia used at least two different size connectors on their earlier chargers. What outside diameter is yours?

I'm not sure. This is the 10" RT tablet with a one piece charger, my tablet is an unlocked AT&T model.