To the OP, just because a protein powder is sold at the grocery store doesn't mean it isn't good. Kroger sells Gaspari , Pure Protein powder is good even if it gives some people smelly farts (I cringed at the suggestion that this makes it of poor quality), most stores sell EAS powders which are still quality even if the brand no longer stands king as it did 15 years ago, etc. Hell, even Body Fortress is fine if you can stand the taste and mixability. The key is brand awareness, knowing who makes good product, not where to locate it.
Lastly, the thing with the metals, I think I know what you're speaking of and it was a study involving only RTDs, not powders, and not just Muscle Milk RTDs. It was also extremely alarmist and flawed. You can safely disregard such concerns.