Hmm, well, I love the cacao butter from alissacohen.com, bee pollen you get can really good anywhere, lucuma is best from naturalzing.com or rawguru.com yacon powder you can get from naturalzing.com or rawguru, and mesquite from rawguru or naturalzing.
For bee pollen, my suggestion is to look locally if you can. I have someone near me that sells at my farmers market and I get good stuff for the same price as I would(if not less) and no shipping to worry about.
Are you in the US? Try Local Harvest Website for local beekeepers.
I am interested in the mesquite powder as well, will be watching as well for peoples suggestions!