The battery covers look good, and i've no idea why so many B6's are missing them, all facelift B5's had them, so you'd have thaught they'd have fitted them as standard to B6's, unless they've just been lost/broken/discarded over the years?
I actually prefer the bay without the bottle covers. I like to see the engine and the associated gubbins. Covering it all in plastic is just a bit crap, if you want to hide it all away, just leave the bonnet closed, and polish the bonnet instead.