I am thinking of making a home-made version of this iPad stand:

http://xflexstand.com/

I have most of the components sussed out in my head, except for the flexible neck. I could buy a cheap gooseneck table lamp like one of these:

http://www.wayfair.com/Adesso-Eternity-Gooseneck-Desk-Lamp-5030-22-AE1173.html

and just use the flexy bit but that would mean throwing away the base and the lamp head.

Does anyone know whether flexible steel tube can be bought as a stand-alone product, by the length? Something like the hose that's used in flexible shower fittings but it needs to be stiffer and be able to hold its shape and take some weight.

I have googled for this but without success.

Thanks