We recently lost a Lotus dealer in West Covina which had a good shop.
Some on here use the only remaining dealer - Galpin in the Valley.
The two Indy shops I know of are - A1 Auto (talk to Harry), and DRS, both highly recommend on here, both in east LA off the 605.
There's also a Lotus Club of So Cal which is worth joining.
05 Elise, ST, sports, touring, hardtop, DBA 4000 slotted discs, Ferodo DS2500 pads, Sector 111 gpan3, EP Tuning Quickrack, Pro Alloy rad, DS brace, HnT pad, front and rear tow hooks, CG lock, ORE double cup holder (caffeine for track); '86 911 Targa (sold); '68 MGB (being restored)