For fabric supply build up, I shop mostly at the fashion/garment district in the central part of Los Angeles-don't miss my other post-
Guess What Store Type These Photos' Subject Matter Are From! for more information including photos, Joann's in the inner & outer suburbs for their numerous discounts (the quilt I finishing up on is 100% Joann's consisting of bolt ends, remnants, and at least a possible additiona 50% off that much, saving up the resulting trips over roughly a year of stockpiling these assorted fabric). plus more & more closing stores which seems to happen al the time around here for some reason or another. I don't run out of fabric for a specific quilt design. I seem to always have what I need surrounding me.