part number wanted

[stevewestyorks]

i dont know if anybody can help but i'm looking for a part number for a centre cap that fits into the middle of a mk1 vectra gsi alloy.
i went to the local vauxhall dealer but they just looked at me like they didnt know what day it was!!!!
any help is very greatfull!!!
thanks.

[Strick]

No GM number on them Steve, dont forget they were an ATS wheel originally, not Vaux.
Anyway, heres what IS on the back if its any use
>PPO<
A 1056 - 1,5