Question
Where can I purchase these type of willows for shipment to me in California?  Thank you.

Answer
You should be able to check with your local nursery. They may have it or can order it fro you. That way you will have a local contact if the tree does not live.  

Here is a web link to a wholesale nursery--they maybe able to tell you where you could buy Globe willow in your area.

http://www.davewilson.com/br40/sales_info.html