I sometimes use Naples Yellow from Schmincke. It's different from my other yellows as it's sort of a pale warm yellow. I do wish it was more transparent though. Does such a colour exist?
I see the Schmincke product is a mixture of PW6 (titanium white), PY53, and PBr24, all of which are opaque pigments. It may be possible to come up with a mixture of transparent pigments that simulates Naples Yellow, but you will have to do some experimentation. Perhaps you could look in these databases for ideas: