I just tried my extension out, the hole in the male end is a hair or two smaller than the factory one, so it just about fits on. Female end is fine, so naturally the male is fussy.Yes, The extensions I got off e-Bay don't meet the specifications. The wall warts that have those cable ends all fit. Angry is a mild way to describe how I feel about it. Furious comes a lot closer.
Dang, the price was right.