If you don't know Juicedlink.com, its is primarily an audio company that produce and sell pre-amps for Video production. They bridge the gap between profesional Audio Gear and Prosumer camera connections. Of late Juiced Link have branched out into camera brackets and other HDDLSR support equipment and they offer these at sensible prices.
Juicedlink.com also has a collection of excellent Audio for Video tutorials. Sound is 50% of the picture and bad sound is worse than a bad picture. People will sit thru a bad picture, crappy sound and they are gone! These are a must watch, you will learn something and you will produce better work. So hit those Juicedlink.com links and win! or BUY BUY BUY.
I can tell you that, with only a marginal fear of contradiction that short of whittling yourself one, Juiced Link offers the most inexpensive option for getting a set of rails on your camera. Looks like they will coming up with some slider products as well. I will be making an order when my budget (AHAHAHAHAHAHAHA) allows it.


