As per that thread:
2004 Production, courtesy of Jay Herbert:
Total ZB Built: 2435
First Unit Off-Line: 1B3JZ65Z04V100033
Last Unit Off-Line: 1B3JZ65Z44V102416
U.S. Market Total: 2231
Canadian Market Total: 200
Mexican Market Total: 4
Color Breakdown
PRN Red: 809
PX3 Black: 906
PA9 Silver: 516
PWA White: 203
PYR Yellow: 1
Limited Edition Builds
White Mamba 200
Black Mamba 200
Yellow VCA 1
Silver VCA 1
2005 production numbers have not been released, however I suspect Jay will have them in the not-too-distant future...