Suggest you contact the WA State DMV and ask them. If they don't do this (for a fee I'm sure) you can at least ask them who does. Also, if you go to ICBC's website you might find that they can also do this for out of Province for a fee, based on an article I read in the paper in the last week or so.
Congratulations on your new purchase. Another Airstream moves into the Vancovuer area - it just keeps getting better all the time.
Post pictures when you can.
Barry & Donna
Life is short - so is the door on a '51 Flying Cloud (ouch)