Hey! Glad to see you are getting back to the bike. I've been MIA on my 550 (and this forum as well) for a while. Nice surprise to have this update in the email this morning.
Where did you end up with work space? Are you still in the neighborhood? It's amazing how many cool builds are happening within this Williamsburg/Brooklyn community.
I'm not sure that you can get a key made from the VIN, you might be needing a new ignition, unfortunately.
You should stop by the garage sometime. Some really cool people, and stuffed with too many bikes!
Congratulations on getting back to the rebuild. I'm sure you'll have it squared away by riding season.