So do you know which version of board monitor radio you have? BM24, BM54, BM 53? There are probably others out there but I don't know what there models are.

As for the new nav disk I downloaded the North American one but it took like a week ony my cable connection to download the torrent. Only about 2.15 gig but was slow because at times there was nobody to download from.
From what I hear the DVD for Europe is even bigger. I would say your best bet is ebay. I have always had good luck with my dealing there.

Thanks for the info!