Chocolate – the safest way to acquire non-alkalized cocoa powder

I am looking for a non-alkalized, full-fat cocoa powder to use in recipes. By non-alkalized, I mean cocoa which has not undergone the Dutch process.

The problem in detail: Gourmet grocery stores sell various "raw cacao" powders that fit the bill, however there seem to be safety issues. For example, ConsumerLab shows high levels of lead and cadmium for many of these products. Some products even have a California Proposition 65 warning. One might treat these as a guide, however absence of a bad ConsumerLab result or Prop 65 warning isn't a strong signal, because batches vary and many brands don't even test their product. It would seem likely that the safest cocoa products would come from big brands like Valrhona, Callebaut or Guittard, however their cocoa powder products are all alkalized.

Back to the question: What is the safest way to acquire a high-quality, non-alkalized cocoa powder? UPDATED: I would accept a definition of "safe" from someone with expertise in the area of metals contamination in food, but short of that, here's what would qualify as "safe" for me:

• A product from a major producer in the industry.
• A product from a company with a specific commitment about metals contamination, such as stated practices or certificates of analysis.