Shopping service in Japan?

Is there such a service in Japan that has merchandise from concerts?

You see, there is a bottle of perfume being sold at AnCafe's concert on May 17th that I'd like to get, but I would have to attend the concert.

Out of curiosity, is there a site or something that I can get a hold of someone that is going and would be willing to pick me up a bottle?

Please and thanks for any response.

Concert merchandize is usually available at each artist's official website, be it a foreign artist or domestic artist.

However, I assume the one you want is sold out.
http://www.official-store.jp/ancafe/

You can seek friends through fan sites, but I'm not sure if anyone would want to do some shpping for you unless you become really good friends first.

Another option would be to look into the Yahoo Auction site which is in Japanese language.