Hi, I'm new to the forum, and need some help.

I have a Vectra C 2004, with a 2.2 petrol engine, recently it has bee leaking some oil, and I need to replace the Valve cover gasket. I live in the Dominican Republic, and here the car como as Chevrolet Vectra :S, the part number that appears on the GM catalog (part no. 12584084) does not fit!.. it is smaller and thiner, looks like they have wrong in the catalog.

Does anyone have the correct part number for this? Where can I find it?

Please help!