You gotta get it from head shops or online. Dispensaries are sleeping on it. Sometimes they have it in the form of random prerolls but all the interesting new ultra low THC strains are found online or in head shops.
Hemp flowers or CBD hemp flowers/buds. Although I'd look online for the exact strain you want. Tweedle Farms is a popular and reputable grower, and many of the strains they sell are grown by others, so you could use them as a reference for some of the strains that are out there.