If it has the correct VW specified ratings, you should be fine. But I don't think it does. You must be in a small town. I can find 5W40 Castrol all day long at O'Reilly's. And if they're out, surely they could order some for you within a few days (Unless you're not in the lower 48. Then all bets are off.)
I live in San Jose, believe me, its not readily available as you would think. I could find only 1 quart bottles each one is running around $10. When i read the label, it looked like it could meet the requirements but I am still paranoid..
Either way, I will give it a week and post my findings here