Option 1: get all the parts yourself
Most of the parts listed here can be obtained at your local electronics store.
DisplayDuino and ServoBoard are sold through Sparkfun.com.
Source code and DXF files for unique parts are available online from http://visual-hexapod.sourceforge.net/
You will have to the parts yourself. I used 2mm Acrylic though you may want to try aluminum or some other material. I recommend a CNC machine.
Some of the parts come from lynxmotion. Shipping costs vary.
If you download the source code you will find the DXF part files in /trunk/other/part layout.dxfOption 2: get all the parts in a kit
It costs more but it's a lot more convenient. The extra money will fund further developments of your robot and other future robots.get the kitEditor's note: I did a search among the online hexapod retailers I know. For the equivalent closed-source kit you'd either pay about £630 or $1200, depending on who your order from. I'm offering the full kit + shipping for $999. Don't take my word for it - if you find a better price, send me a private message please!