"Finding" someone might prove difficult. Have you tried DIY? I gave up at first, trying to clone my ADV ( Bombies Black Out City), but then a few months later I found a new clone recipe and gave it another try. A few iterations and it was near perfect.
I haven't bought commercial juice ever since and discovered many new flavors I never encountered in commercial juice.
I mean, I'm not one to shove DIY down one's throat but if you like Milkman and find it too expensive, it's clearly the only way.