Found a source for bark fines in Orange County, CA.
I've had a real hard time finding the appropriate source. The Repti Bark at Petsmart and Petco will work, but way too expensive, I have quite a few plants I want to pot up in the gritty mix. The store is called Orange County Farm Supply in Orange, CA. I've been buying different ingredients from them for my plumeria soil mixes, and just noticed that they have this:
This bag costs $10.49.
So for the gritty mix ingredients, Turface/NAPA and bark fines are readily available. It's the grit/cherrystone that has eluded me. I'm gonna substitute Pumice for that.