The demise of Rubbermaid had nothing to do with California legislation. There is a mixed bag of California laws ; classic steel jerrycans cannot be sold but the stores have a plethora of your lamented plastic ones. Gasoline for long term storage can be treated with stabilisers to prevent degradation.
www.majorsurplusnsurvival.com sells it. Gasoline is best stored AWAY from the main domicile in a vented storage room with a clean,dry floor, preferably not of cement which can spark a dragged can with results garanteed to warm the souls of people concerned about Sparklites, Bics, metal matches etc. A NO SMOKING sign and a lock and chain to secure from theft are usefull.