Hi,
Try
www.ebay.com
Search for
Icom HF,
Icom SSB, Yaesu HF, Kenwood HF, etc.
Read the specs well, make sure it works, operates off 12 volts, also make sure it has a general coverage receiver (say 3Mhz -30 Mhz).
Bid well and arrange for a FEDEX or UPS shipment.
I will sail confidently to the ends of the earth with most of these radios offered.