Can't help with your specific question but if you are after breastmilk I had a session with Black Booty a couple of years back and she has really long nipples and she was squirting a lot of milk over my cock and then sucking it off, I was filming it too so it was a really nice experience.

My advice would be don't waste too much time looking for ladies offering bespoke kink services in Sydney since not many explicitly advertise and these days those that do are often not genuine and charge way too much for it. I've been into kink my whole life and you'd be surprised what I've had women be willing to do, working or otherwise, like some pretty weird shit, and they come out the other side pretty happy too, even in shops not just privates.

Think about it, imagine dudes coming in one after the other all day long wanting some DFK or whatever, how bored would you get. Then suddenly some guy turns up wanting you to bark like a dog and crawl around or act like getting molested on a train, it would break up the monotony and energise you.

I even remember domming an asian private years ago who is still around and is a really cool chick but her rates are way higher now and she only doms, but even when I contacted her on the phone she said "I think you should find another provider" a few times but I persisted and convinced her to be a sub and tied her up etc. etc. and had the time of my life, so don't just treat it like buying a loaf of bread and try to manipulate and negotiate and sell your ideas to get what you want.

Also get on Fetlife.