Grim, There were a few online dealers that carried a few, but sadly they are gone. I've bought several on ebay. Just look under survival. They pop up now and then. The average price is about $25. Most are the TRA-CON plastic box. There were actually a few manufacturers. Current lots are by AVIATION MARINE INC. 6626 Easton RD. PIPERSVILLE,PA.18947. Be carefull of the EBAY units. They should be sealed. I bought a few opened and missing some components and found one sealed unit a mass of rust and mildew. I am trying to get the Marine portion of a fishing kit review completed for a later article.