I'm the mentor for an FTC team. As such, I've been looking over options in case the team ever moves upwards (and I've been following the CNC's for awhile). I really like the Openbuilds OX platform as it seems to match the needs for a robust, extendable (and precise) frame system with reasonable cost. I believe there are a few folks that will supply the parts as a kit. See the discussion area for more info and the first few posts have the current kit suppliers
http://www.openbuilds.com/builds/ope...c-machine.341/
One supplier in the USA (
http://www.smw3d.com/ox-diy-cnc-kit/)
Like all Openbuilds, there is a great community effort. In addition to the discussion thread, there is a G+ group
https://plus.google.com/communities/...28951643236736