Where to find decorating supplies in the USA (West Coast)??

I’ve already posted this topic on CakeCentral, so sorry if you’ve already seen this there.

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Hi all you lovely Cake fairies!

I am going on a road trip to the USA (Los Angeles – San Francisco) in May. YAY!!!
And I am trying to figure out where I can shop till I drop in Cake Decorating supplies?
Think; cutters, moulds, impression mats, modelling tools, coloured lolliepop sticks, cake lace etc.
Preferably a one stop shop that has everything. This trip is mainly a holiday and I can’t be dragging my poor boyfriend all over the country for cake stuff ;)

Also where are all the good hobby shops, where I can find cheap patterned paper, ribbons, silicone mould compound and possibly even a Silouette cameo cutter and the fondant cutter attachment?
I hope you guys can help me. Only 3,5 weeks till I go. Eek!!!

Cheers,
Stephanie Maas
-Wanderlust Cakes