Where can you find large blocks of ice for ice blocking in san diego?

Question:

Answers:
There are any number of companies in and around San Diego that supply blocks of ice. Look them up.

Here's one:
CO2 Cool Dry Ice Services Inc
8205 Ronson Road,
San Diego, CA 92111
(858) 505-0035

BTW, say hello to my niece Joann (pronounced Jo Ann)