Before you search for a "hot" CD key, you need to understand why this game remains in demand.
If you are looking for how this game fits into lifestyle and entertainment culture, you want papers on Sports Gaming and Fandom.
Paper: "Playing the Game: Football Videogames and the Fans"
Here is the irony of the modern search: You don't actually need a CD key to relive the 2002 glory days today.
Because the official servers for FIFA World Cup 2002 were shut down over a decade ago, the CD key verification for online play is essentially obsolete. The modern community of retro gamers relies on two things:
Since the 2002 game is now a relic of the past, the most relevant modern "paper" is likely found in Game Studies regarding nostalgia.