...I've had great luck with 'Grandma's Secret Spot Remover'. This product has amazed me (more than a few times) in its ability to get rid of stains that seemed hopeless. Even long standing, set-in stains.

Unfortunately, I cannot seem to find anything larger than a 2 oz size bottle-which doesn't make it easy to cover a large stained area. However, on something as expensive as your jacket, I think it would be worth the investment.