Download the Weedmaps app on your phone. It’ll tell you where all the dispensaries are at and what products are available where. There’s a tab for cultivation in there too.
Where do you live? That’ll narrow down where you’ll go probably. A good chunk of the commercially available clones are from Dark Heart Nursery which I’ve had good luck with. Harborside in Oakland or San Jose will have clones. Elemental Wellness is another one. Lytt has been my spot in Pacifica for clones. I know there’s others too.
Hope this helps