Jacqui,
Very aproppriate post!

Last year both Brazilian teams went to the kickoff and bought the bins in Walmart. This year there are three teams from Brazil, and only two of them went to the Manchester Kickoff.
We (#383) managed to send some red balls to our representatives and they brought the balls with them in the plane.
Mr. Todd Lovelace from team #86 graciously volunteered to send us the big yellow balls, and I suggested to the other two Brazilian teams to try the same. As I haven't seen any post from them regarding this subject, I wonder if they already found a solution to their problem. I'll show them the link to this discussion.
Raul's solution seems a good one, except it's probably better to stuff more balls in the package, as the flat international rate is very high. I'm sure the payment details can be arranged between teams (Paypal is great

)