The Soundocity gear is good, though: Solid. And Paul was super cool and helpful answering questions and making certain I got what I needed. I have 4 pairs supporting platforms for my towers and subs. Milled steel, powder-coated, and the knob/spring/spike assembly is nice... A pair for 1 speaker is only like 130-150 depending on the size IIRC, so 1 pair of speakers at most would require 2 pair of outriggers, the largest of which would be $296 total before shipping.
To be honest, I agree with Lovin' too, you can turn this into an good DIY project too. Wood, driil, spike set from Parts Express, some extra hardware from the hardware store... some tracing paper. Might not be as sleek or adjustable, but you can make a platform out of a wood cutting board! A fraction of the cost.