Most bamboos seem to come from summer wet monsoon climates, FWIW.

This nursery comes to mind as one of the most likely to make a solid recommendation: http://www.bamboodirect.com/

Phil Bergman does not sell bamboos as far as I know, but I suspect he would know a thing or two about their cultivation in SoCal: https://www.junglemusic.net/index.htm

Where on the 'coast' of 'socal' is cold enough to be zone 9? I would have characterized almost the entire southern half of coastal CA as zone 10 (and large swaths of the Northern half all the up to Eureka or so) unless you are a ways inland and at elevation.

I'm not a pro, but saved this for myself:

"Bambusa textilis gracilis is a very fast-growing bamboo that can reach 25’ within 2 to 3 years. Zone 8B - 11. Popular in North because it can handle temperatures down to 15 degrees Fahrenheit."

Modern Landscape · More Info

"genera Phyllostachys and Fargesia. Towering, non-invasive clumping bamboo creates a forest feel in this shaded garden area. There are many cold hardy to Zone 5 above, particularly genera Phyllostachys and Fargesia."

Shaded Asian Garden with Mexican Beach Pebble Detail · More Info

Thank you daviddrt28, garden gal and everdebz for the responses! i am a little inland near the LA area so thats how im in a zone 9. Im thinking of going with Moso bamboo, alphonse karr, or mexican otateas. I visited 2 bamboo nurserys and they were out of all of these types.. Ill keep trying elsewhere. Any reccomendations on which one grows fastest/ best for privacy? How long do most culms take to establish? Thanks again!

Some don't ship to CA - ? -

https://www.willisorchards.com/product/golden-bamboo-plant#.YqkwtqHMLIU

To 10 feet tall -

https://www.willisorchards.com/product/golden-goddess-bamboo-plant#.YqkxG6HMLIU