Genuine Art Deco kit is hard to come by. There's a huge industry selling on auction sites such as eBay etc. I'd hazard a guess online would be the best place to seek items.
There's a decent - although pricey - store next door to Paddy Reilly's. The woman there is friendly enough though I wonder how much she shifts; some things have been in that store for years.
Surprisingly the Flea markets are worth a look but be an early riser; most of the fresh stuff is gone by 9am, or they're asking ridiculous prices. Bürkliplatz in Zurich is often 300% more expensive than Helvetiaplatz, so cut your cloth etc.
Reproduction stuff should be easier to find; again, try eBay
Ps, here's something from
eBay in Silver, currently at CHF 250: