idler arm id help!!

I kept getting the idler arm pictured for my 74 from Advance, Summit, etc. All had a "Note"; "Not for Police or Taxi service vehicles". None of above outlets mentioned had any other and all were saying superceeded number. Got 4 of them in a months time. They all looked like extra curve on both axis, see my pics 1 & 2 below.

I finally got the right one for my 74 Dart custom off ebay it has curve on one axis, straight on second axis. Also did not have the "Not for police" notation. Also had ad that stated, "If description is unclear see pic due to it being "ACTUAL" part pictured"
See also the bushing that goes all the way through on the straight one is thicker, and the 2 curve one has that end shorter and sealed so as not to be able to press out and reinstall new bushing.
See my pics 3 & 4.
Good luck!
It took me almost 2 months to get it replaced and front still rattles LOL!
John:coffee2: