Actually, I got it from Aussie who obtained 3 or 4 dampers before Terry started selling them. Dealer installed it but I did not write down the part number. It is a Euro-only part now, from what I understand & not yet available from US dealers.
1999 Amazon Green SVT Contour (#554/2760) Stock SVT Duratec V6 with: Intake- K&N filter/75mm MAF meter Exhaust- MSDS Y-pipe/Bassani catback Durability-Ford "dual mode" damper, Mobil 1/K&N oil filter 179.2 FWHP at 6900 RPM