Damaged engine/gearbox undertray

Hello everyone, as some of you might know, my Avant is a bit poorly at the moment and has had a few bit of trim taken off several times, including the engine/gearbox undertray - which looks like this one:

http://www.ebay.co.uk/itm/321655559942?clk_rvr_id=1136652525794&rmvSB=true

Sadly, mine's knackered and I wanted to buy the above one, but when I check the fitment of that one against a Quattro, it says it doesn't fit my car. What's the difference between a normal A4 B6 and the Quattro underneath? Could it fit with some fettling? Or can anyone suggest where to get hold of one?

Many thanks

Thanks QC. It looks like I'll need to look elsewhere then, as my Avant is a Quattro diesel. Any ideas ?

Thanks for the find. I'll get ordering ASAP