Canadians got them first
When I was shopping in the spring of 03 I saw 2 Dorado Gold Limited V8s that had originally been delivered to Canada. They had been slightly modified by a certified outfit to be legally sold in the US, though they weren't officially "new" any longer. Mostly it was a matter of changing the speedo unit to MPH as it's primary display.
The units had some extra and different labels on the driver and passenger doorjambs, and I'm pretty sure the build date was August 02! The dealer actually had 3 of these units, though one had been stolen for a couple of days (towed away by the bad guys, but fairly quickly recovered) and I think that one was a couple of months newer.
BTW, the first V6s I saw were on the same dealer lot in late december of 02.