Icons.com has a lot of nice things. I haven't bought anything personally, but they are licenced by FIFA and UEFA, and I don't believe any other memorabilia companys are. I might be wrong though.
In saying that though, couldn't see any Juve signed jerseys except for a Pirlo one...
I found one on ebay but looks as though the guy has started his own authenticating company and authenticated it himself. Not sure if I want to take the risk. He has no negatives but still I'm cautious.
yeah man I'm the same just wait for them to auction some of their stuff, that's what I did with the Liverpool signed posters, got them for half the price.