I'd like to purchase an item that's only in stock at the San Diego store. Can I have this item transferred to my Costa Mesa Ikea?

I am sure you can order and ask them ship to the store near you.

With me you can ask customer service location Costa Mesa contact San Diego on hold, purchase now pay in full and ship back to Costa Mesa, already you come over pick up. No problems.

I'm sure they can

I dont think they do that unfortunately