. Botanical supply companies. (or possibly some healthfood stores)
I buy from Star West Botanical in the Sacramento area.
Saw this one. Had good reviews and looks like they’re dried so you get a lot of them.
https://www.amazon.com/dp/B07L34W8T2/ref=sspa_dk_detail_1?pd_rd_i=B01BE1CPBK&pd_rd_w=Mr55O&pf_rd_p=21517efd-b385-405b-a405-9a37af61b5b4&pd_rd_wg=GOGOE&pf_rd_r=1B0JCZHC95ZCV791JQ9B&pd_rd_r=e41cfcd9-0307-11e9-8589-1d2b1f88d95b&th=1