I would suggest you pose this question to an auto upholstery shop. You will be very sad if you mess this up.
When owning nice cars like these and the like, knowing a good upholstery shop goes a long way. I have had one near me do some nice little repairs on occasion. Generally, I just ask them for advice and they are happy to give it and sell (or give) me a small amount of their professional cleaning/rejuvenation products. In return, I refer work to them and have on occasion dropped off a bottle of wine or a restaurant gift card ... money well spent in my opinion.

I know how frustrating a spill can be,
I hope you are able to sort this out.

Chris