you prob find the astra one is a different part number and is more expensive than the vectra one
even though they are the same part
i remember this discussion a few months back about it, vx220 parts are more epxensive though the same as the vectra but with different part numbers
this is for the vectra
4 (24426068) (56 07 085) COVER, CYLINDER HEAD, WITH GASKET (KAISERSLAUTERN) (NLS.- USE 12584083) 1
5 (90537319) (6 07 494) -GASKET, CYLINDER HEAD COVER (NLS.- USE 12584084)
this is for the astra
5 (90537319) (6 07 494) -GASKET, CYLINDER HEAD COVER (NLS.- USE 12584084) E -11144979 1
5 (24439408) (56 07 475) -GASKET, CYLINDER HEAD COVER (NLS.- USE 55560688) E 11144980- 11494199 1
looks like the different part number is based on later engine number [plastic cam cover ?]