Russell,
Are you in the US now? Do you have your FAC with you? Do you have a variation for .36 B/P revolver?
If so, put it in a airline approved luggage, bring it over. Go through the "Red" channel at customs and declare it. Pay any duty deemed necessary and Customs fill in your FAC. Inform your firearms dept in the usual way, jobs a good 'un!
For personal imports your FAC/SGC acts as all relevant import docs. Look through the notes on your ticket and you'll see it printed there.