Leeroy,
The Lamps are from Hella
http://db.hella.com.au/cgi-bin/catal...w&flmaint=2743
They are the same diameter as the original Lucas lamps but they are much flatter. They only sit proud of the body by about 10mm or so. They are semi frenched for my application and I have used a bracket behind the lamp to secure it. (same as instruments on the dash).
Two things I never liked about the original Cobra were the later Lucas rear lamps (The L542's were much prettier I think - they're the rectangle lights) which, from what I read, were only used (a parts bin special) because they no longer had L542's available;
and halibrand wheels.