You're welcome...I don't give up easily so I searched all the expired Coke sweeps, plus the current ones. Then I searched the current sweeps for FIFA and found this listing, which doesn't mention your prize BUT at the end of the official rules there is a portion for West Region (pages 6&7) West Region Overlay and Addendum.
The West Region portion sounds like your prize:
"7. Prizes:
900 GRAND PRIZES (28 PER DAY): A set of 6 tickets to Coca - Cola's 2014 FIFA World Cup Fan Experience which takes place April 19 and 20, 2014 in Los Angeles, CA. Terms and conditions of tickets apply. Seat locations to be determined by Sponsor in its sole discretion. Sponsor is not responsible if Coca-Cola’s 2014 FIFA World Cup™ Fan Experience or any other scheduled event is delayed, postponed or cancelled for any reason and winner will not be reimbursed for tickets. Tickets may be subject to issuer’s standard rain-check policies and procedures. All expenses, travel, and other costs not expressly stated above are the sole responsibility of winner. Lost, mutilated, or stolen tickets will not be replaced. By accepting ticket prize, winner agrees to abide by any terms, conditions and restrictions provided by the ticket. Sponsor is not responsible if winner does not use ticket on day of
Coca-Cola Sweepstakes’s 2014 FIFA World Cup™ Fan Experience. There is no retail value associate with this prize. The odds of winning a Sweepstakes Prize depend on the number of eligible entries received through this Sweepstakes during the West Overlay Sweepstakes Period.
No substitution, exchange or transfer of prize by any winner. Sponsor reserves the right to
substitute any prize for one of equal or greater value...
Limit: 1 Sweepstakes Prize through this OverlaySweepstakes per person.
8. See Promotion Official Rules for Publicity, General Conditions, Release and Limitations
of Liability, and Disputes details.
9. Sweepstakes Results: For a list of winners from this Sweepstakes, visit
http://bit.ly/1cNEunk. The winner list will be posted after winner confirmation is complete."