Baby powder is fine, given that I don't know that one can even buy talc powder anymore. It's all made with corn starch now. Go right ahead and bread those nuts (verifying that it's non-talc breading, just to be safe).
“Talc is a clay mineral composed of hydrated magnesium silicate with the chemical formula Mg3Si4O10(OH)2.”
To get actual unscented pure talc I had to find it on Amazon.
Talc is still big business.