[drewkongs]

As an electrical engineer, I pretty much pretend radio shack doesn't exist. They're overpriced, stock low-quality items, and what each store carries varies wildly. I typically just order from Digikey or Mouser (electronics component distributors).

A friend brought me a connector that fits, and its outer diameter measures 3.4mm and inner diameter measure 1.35mm.

I found a connector on Digikey (part number CP3-1003-ND), a 3.5mm outer diameter (I measured with calipers, there is lots more than 0.1mm worth of play on my camera) and it should work if anyone wants to order it from them instead of radioshack. It is half the price and I order from Digikey frequently anyway. You could also throw it on your Digikey voucher order if you were already ordering something else (we ordered a practice battery with our voucher - digikey p/n 522-1014-ND).