I had an ink disaster with a leather coach bag too. I pulled the unattached lining out to work on it, and got most, but not all of it out using rubbing alcohol. In desperation, I used it on the leather too, and used an eraser designed to be used on suede, to rub off some of the ink stain. I knew I might damage the leather, but had nothing to lose. After much toil, it was vastly improved but still not fit for public display. I then took it to a shoe repair shop, and the guy sold me some tinted stuff to treat it with. I followed his instructions, and now it looks pretty much normal. Not perfect, but unnoticeable.