I need a pair of speaker stands.

I'm after something that looks like this:
http://images.audioasylum.com/usr/y2011/08/50141/speakers.jpg (i.e
black, square section steel in a design composed of right-angles).

The speakers have a footprint of 20cm wide by 18cm deep, and for
aesthetic reasons the stand needs to match that as closely as possible.

Are there any models I should be looking out for on the second-hand
market?

Thanks,

Daniele