Maybe you solved this already. If not, would be good to confirm that the Raymarine unit died. Often it's the connections that are the problem. If you haven't double checked those, that might save you some repairs. If you are sure it's really dead, I also recommend ebay. I had good luck replacing our helm raymarine radar unit - LCD died from FL heat. As a slow learner, I had to replace the replacement - but I also found a good unit for that. Obviously you need to be careful on ebay, but you may find good replacements.