Thanks for the replies guys, I have tried my local ICOM dealer( according to ICOM) phoned three times today to speak to someone about this and get a price but still no luck. According to the internet you can download the software and buy a cable and its a 30 sec job but cant find the software anywhere and is almost certainly frowned upon. Anyone know a good ICOM dealer who I can post my radio too?, I was thinking today about just connecting up my garmin and forgetting about the wrong MMSI number being entered in the radio but came to my senses in the end!!
Lesson learned - dont bid on a radio that is ending in 1min 30 sec's as you dont have time to ask the seller any questions!!!!