Yeah, still called them milko's in the 80s, even though milk was delivered to your door. By the 90s both the milk runs and the milko's were gone.
The only ones i remember surviving were also takeaways. Which now that i think about it, is probably also a colloquialism.
Most of them have closed though, given that more people have cars and are willing to drive a bit further to save a dollar on their loaf of bread at the supermarket.