You're in San Diego - have you tried Marshall's Hardware just off Miramar? They've got a much better industrial hardware selection than the average home improvement store.
Also check out McMaster Carr online at www.mcmaster.com. They have EVERYTHING and in major cities like San Diego if you order by about 10am you literally get your order that afternoon. Try searching for Electrical Wire Connectors. I think they might have what you need on pg 718.
EDIT -- Sorry, I got mixed up... they have ring connectors on pg 718, but you needed blade connectors. Either way, have a look around the site. Good luck.