Andrew,
The third brake lights have been fitted by law in USA since about 1986 so
they are hard to find here as after market parts anymore.

On your mention of pronunciation,     I have learnt whenever I am in the
antipodes, that I can tell the difference between the Aussies and the Kiwis
by the way they pronounce "six"  ; )
Im sure there are other differences but I'm a pom so how the hell would I
know !
Its friday  (well here anyway)......enjoy!
Steve Cotsford