A clue about your location would help, even in this age of online shopping.When you say scaffolding, I'm guessing you don't mean as used in civil engineering construction, so I don't know what you do mean.
This place seems to have tons of stuff like that.http://www.servocity.com/Sparkfun I think is also getting into this area.http://www.servocity.com/altho maybe not quite as organized yet.
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via Egeo 16