Actually when we first moved to SoCal 33 years ago we used to shop at the FedMart in Costa Mesa. They had a great photo department where you could buy darkroom supplies including E4 development kits for doing your on Ektachrome slides. However, I was not aware that they were part of the Price Club/Costco DNA. I remember when it closed but can't recall ever hearing exactly why. But it wasn't too long after that that the Price Club opened in Tustin, just a few miles from our house in Irvine.
While FedMart had very good prices, it was not exactly what one would call a 'big box' store like a Costco or Sam's Club.

OCU