If the amount is low enough you can sue them in small claims court in the US, which the amount is dependent on the state. Small claims court is geared more towards people self defending.
Lawyers here are not willing to handle international cases except big business cases.
That said, I'd be surprised if your court system required you to lawyer up for every (relatively) small contract infringement- contracts essentially become pointless for anything less than 20 hours of billable time from a lawyer.