I have two postcards that sound like they might be what you are talking about. I have them in my card listing as 2000 Palm Beach jumbo cards, I have two versions (see above). My understand was that they were given out during a spring training game back in 2000 in Juniper Florida at Roper Dean Stadium (home of the Cardinals Spring Training). The Palm Beach Post newspaper was the one sponsoring the giveaway. Hope this helps.