I'm actually trying to do that very thing when I have the necessary time. I didn't think it would be too hard, as it was fairly easy for me to stumble upon a HA Miltank once. Unfortunately, as you probably know, Tauros is a very stubborn Pokemon when it comes to chaining. Of the rare times it calls for help, it rarely gets any. Plus, half the time help arrives in the form of a Miltank. I was chaining for well over an hour at one point. It got late into the night, so I folded my system into sleep mode and charged it over night. To this day, I have yet to find a HA Tauros. Since the weekend's here, I do plan on trying again. Also, if you're still interested, I do have a HA Minun in a Moon ball I could breed you.