There are also well-connected private security companies such as Executive Outcomes and Sandline that may be engaged in such service even as we speak.
Often these organizations use British ex-SAS/SBS, American ex-SpecOps men, or former Gurkhas. (Nobody scares the Mohammedan cockroaches as much as a Gurkha!)
Here's an interesting story from APB News: Keeping Ships and Cargos Safe From Pirates.
-ccm