wetrat
Contributor
dpbishop:Underwater Schools of America in Oceanside fills Nitrox.
225 Brooks St.
(760) 722-7826
(877) 896-3483
By the time you drive there and back your SI will have been long enough to dive the Andrea Doria.
USA would be a long haul from La Jolla - but you could easily get a Nitrox fill on the way down from LA or Orange County. They also fill to 50% O2. They are located right next to I-5, literally one minute off the freeway. Just exit at Mission and head East, the first cross street you come to is Brooks. They're on the right about three blocks down - you'll see the dive flag.
http://www.usascuba.com/