Check out the shipping histories but don't think it's a common routing. I'm sure you know, but no direct flights, can go either east to Vancouver or west to Toronto/Montreal (it's roughly around 24 hours either way). The airlines are the usual suspects flying through their own hub, BA, Lufthansa, Alitalia, Air Canada flying east and mostly Asian carriers flying west.
Try Motorcycle Express, probably cost prohibitive even if the ship from there. It is about $1700 from western Europe.
If your budget allows it, I would consider shipping the bike back to Europe by sea and just flying to North America and buying another bike, very good set up bikes and prices.