You might telephone Magellan at 800-707-9971 to ask if they sell European maps; tell them what exact unit you have (e.g., RoadMate 1400 or whatever).
I know that with Garmin it is a lot cheaper in the US to buy a North America+Europe system like the Nuvi 270 ($135 on EBay) than it is to buy a North America only unit and purchase European maps later on. I have the Nuvi 270 and have used it quite happily on several trips in Europe.