Going to Vienna for the first time next month. Any boards members in the area that can reccomend where I can buy some?
I don't know where you can find that. But you should definitely check out the 1516 brewery in the city centre.
A suggestion if I may. On this trip if you get to spend a reasonable amount of time in Vienna, forget about the search for beer and explore the wine and the traditional coffee shops. The beer scene is better these days than it used to be but what really stands out about Vienna is the atmosphere, etc. of the coffee shop (some of the best are outside the Ringstrasse) and the Heuringen. So try to explore one of the Heuringen districts. While summer won't be the best season for Heuriger you'll still be able to get a feel for some aspects of traditional Vienna, etc. and most are easily accessible by tram and short walks.