Having trouble finding parts

Hi there everyone!
I have decided to build a FarmBot, but I want to buy the individual parts rather than pre-order a kit. I started looking for the Extrusions section of parts at OpenBuilds but I was unable to find any of them. Can anyone direct me to where I need to be looking? I thought that the links in the documentation might send me directly to the store pages but I guess I was wrong.

I would also like to know, since OpenBuilds is all open source components, would there be any way that you could make the components using a CNC machine?