I don't know about dwarf mango, but the Rare Fruit Growers will surely know.

FWIW- My Rodale garden book says that, though the tree grows to 90ft [ideal] can be held to half that in home garden by careful pruning. They list popular varieties, but no mention of dwarf.

On a google search, found many references to dwarf mango in FL.

Did you see the thread in the Tropical Fruit Forum?
http://forums.gardenweb.com/forums/load/tropicalfruits/msg051814467007.html

It looks like the cost to ship into CA is betwee $55-75. YIKES.
http://www.tropicalfruitnursery.com/mango-viewer/index.htm

Here is a link that might be useful: CA Rare Fruit Growers

You need to look for the so called "Condo Mango" varieties. They are listed on Top's website (anti spam filter will not allow me to post link) - just google "Condo mango". As for where you can buy them in SD area - I heard that both Exotica Fruit nursery and Ong's nursery carry them. I have never been to both, but am planning on buying from them on my next visit to SD. there are a lot of growers of mango in the Tropical Fruit forum on gardenweb from socal - you can post your question there for more responses.

Thanks for the replies borderbarb and ashleysf. I will repost the question on the tropical fruit forum also.