There are few strains as ubiquitous as sour diesel. I would start with dispensaries in your area to see if they have it. Chances are they will have it in supply.
Check out this map for cannabis businesses in your area: https://www.hellomd.com/biz
You can order sour diesel from our website https://greendoorwest.com/products/sour-diesel Green Door West is an online delivery service. We offer an extensive list of vegan and organic products. All you need to do is register as a patient (with a valid ID and Drs recommendation). Once verified, you’ll be able to purchase products and we will deliver directly to your door (within the greater Southern California area).