ddHiFi
ddHiFi HS400 Rack for Desktop Components
$180
$199
You start off with a base legs that's 2cm, and you choose the next layer based on the height you require: 8/10/18 cm. Each set of stands come with a 30 x 40cm heat dissipating plate. You then decide if you prefer black or silver and you have one neat stack that's neither a make-do hack, nor excessive carpentry.
ddHifi also built this for audiophiles with these in mind.
+ Aluminum for stability
+ Shock absorbing base legs to reduce vibrations
+ Heat dissipation on each layer
+ Aesthetics