I purchased the 20S EVO Single Pack to listen to music on my iPhone while riding.  Later it occurred to me that a 2nd main unit would enable me to power one device on the motorcycle while listening to the other.  This will be very helpful on long rides, including an upcoming round-the-world tour.

Can you please let me know whether it's possible to purchase just the 20S EVO main unit?

Thanks for any info you can provide!