I don't know if I use the same product as you, but what I use is called Lift Off and can be found at Home Depot. There is one specifically for permanent markers. This got Sharpie Marker stains out for me.There is a ink remover that they sell at home depot, in the paint section. Its in a spray bottle. I cannot remember the name I need to buy a new bottle. Dh leaves his pens and markers in his pockets all the time. It may take a few soakings/washings. I use it on everything, it works really good on plastic. I write on containers and just clean it off. Worth a shot and cheaper than a jacket.
I just bought a jacket at Dick's sporting goods. I asked the cashier and she said that the prices are preset and not discounted. I did google a $15 coupon for Dick's and was able to use that.
I don't know if I use the same product as you, but what I use is called Lift Off and can be found at Home Depot. There is one specifically for permanent markers. This got Sharpie Marker stains out for me.