Howdy. Welcome to LA!
It's tough to find a local shop around here that carries a wide selection of gear.
I wear Corazzo: A
Ventata mesh in the summer and a
Tempeste most of the rest of the year. NoHo Scooters (not that far from Eagle Rock) carries them.
New Enough is good and if you buy from them you can opt to make a small donation to Modern Vespa (adds nothing to your cost!). They're good about returns and exchanges as well.
I've also had good experiences buying online from Motorcycle Superstore and Sandhills Powersports.
If you're interested in some group rides around LA, check out our Meetup group:
http://www.meetup.com/LAScooterGroup/