right mine is an auq engine code what other engines are the same and I can use bits off?

Depends what bits you want really

im looking at a inner rocker cover gasket on ebay and it says these engine codes agn agu afy adr aeb ajl

I ws wondering if it would fit my auq engine

As far as I can tell, an AGU rocker cover is different to the AUQ, but the gasket looks to be the same part number.

 

Don't take my word for it though!

 

Euro car parts list an inner gasket for the AUQ here http://www.eurocarparts.com/ecp/c/Skoda_Octavia_1.8_2003/p/car-parts/engine-parts/engine-parts1/car-gasket-seals/?368780020&1&540c6bc28f54964f57c2d85fa821fe5d38fc08b8&000541 for £7.58, it could be cheaper than eBay

 

cheers ill have a look at that