A similar thing happened to me - a bottle of hand sanitiser exploded in my black leather bag whilst it was laying on my brand new cream leather car seats!!! Soaked through and transferred the black dye from my bag onto the seat, leaving a massive black stain. I tried to remove it gently with leather cleaner, only to find the more I scrubbed, the more I took the cream colour off and started to damage the actual leather of the seat. In the end I took my car to a furniture upholstery place and they colour matched the leather and sprayed the area that was damaged. It looks great now. If you look REALLY hard, you can still see where I took some of the grain out of the leather (too much scrubbing), but otherwise you wouldn't notice - best of all it didn't cost the Earth. I think a small area like what is on your chairs would come up nicely - it would probably cover the ink stains too. I think it's worthwhile getting the job done professionally. Good luck!

Would be quite hard to find something like that here in Australia , have you tried at shotts ? Why don't you import them from America ? Cassie would deliver for you right to your door

Not exactly the same but freedom have similar on sale from $199 to $129 https://www.freedom.com.au/furniture/dining-room/dining-chairs/26/23745407/franco-dining-chair?gclid=Cj0KCQiAmITRBRCSARIsAEOZmr7a4odo38PiNP8yKxU0tXmxGh0Vork1BNoDQ-hQt60Co-5D8gBSMNQaAqa1EALw_wcB&gclsrc=aw.ds

Mimosa has a similar product. Without knowing the actual furniture manufacturer, mimosa may be a good alternative.