Apologies if this has already answered, I've been looking around but can't find the info, maybe because it's a non-question...

Is there any difference between a 41.8mm headset and a 42mm headset campy style? Park Tools discusses 41.8mm headsets for campag hiddensets. I've seen the record advertised as both 41.8mm and 42? Does this mean that any 42mm integrated headset will work when the bike says 41.8mm?
Lastly, as sad as this sounds, are there any decent silver ones available?

Thanks.