Through the misuse of a variety of tools, I've succeeded at something I never expected to manage: extracting the nub of the snapped-off power adapter from my old iPod dock.

I found a number for possible replacement parts, which I'll call tomorrow, but this is an old and apparently uncommon model, totally unsupported on the manufacturer's site (including their "discontinued models"), and in any case I'm curious: how standardized are these power cords for consumer electronics? Is each totally unique? I'm wondering if I can't find the cord designed for this unit, can I maybe find one that will work? Do I just have to match up the input and output and have it fit in the hole, or is there more to it?