I forgot about (ALL HAIL) Bob Gollihur's list....Duh! Go to Bob's website and look for the luthier directory...I'd bet good money he's got at least of coupl of listings for L.A. in there.
Fine work comes out of Los Angeles Bass Works by Lisa Gass. The number is 213-953-5122. This recomendation comes through me from Carlos Henriquez who plays with Wynton Marsalles among others. He has seen her work and loves it.
Ditto Lisa. My sister and brother-in-law run a Guild violin-repair shop in LA called "Vita Dolce Violins." They used to work with Lisa and recommend her very highly. And man, they are fussy!
She did some bridgework, tailpiece and soundpost adjustments for me today. Super nice gal and very reasonable. I'm thrilled to have found a local luthier who I like and trust.