asked the CG if I could contact them via SSB and
they said no, they did not support SSB frequencies.

How odd. It seems the US CG only monitors the SSB DSC frequencies, not
voice or telex. However, since they have to respond to SSB DSC, eventually
with voice, they must have the voice kit. Surely they would be in breach
of the GMDSS rules if they didn't?

Plan B is mention 'drugs shipment' on 2182 - that should get a
response...couple of cutters, frigate, helicopter carrier ;-))

Mike