astra g 2.2 airbox

can you guys help me.
im trying to get my hands on an airbox, but im not 100% sure about part numbers.

ive found 9129077 on epc, and pictures in google, but thats all.
ive found various on ebay, with the number 9129076, but all seem to be abroad, in europe.

is the epc number wrong, or is that a uk spec number, 77, instead of 76 ?

as far as i can tell, both boxes look the same to me.
cheers for any info/help.

if anyone has one, i have a post in the wanted section too.