Here are all the 3D printed parts for the RepRapPro Ltd version of Huxley. Despite what it says on the left, it was primarily created by Jean-Marc Giacalone. I added a few bits...
You can print all the plastic parts for a complete RepRapPro Huxley in another Huxley or any other model of RepRap, of course. The RepRapPro Huxley in the picture has just printed the last of four trays of parts for a copy of itself.
You can also print them using virtually any other 3D printer such as a MakerBot, Stratasys or 3D Systems printer. (The only 3D printers known not to work are ZCorp powder printers - their manufactured parts are too weak.)
The .zip file has all the STL files individually so you can print them however you like.
Full instructions for printing the RepRapPro Huxley including a table of how many copies of each part to print can be found on the RepRap website here, along with other prearranged trays for different 3D printers:
Full instructions for assembling the machine can be found on the RepRap website here:
The masters for the STL files (including the source OpenSCAD files) and the whole of the rest of RepRapPro Huxley are on Github here:
RepRapPro sells complete kits (and also kits for everything except the printed parts if you want to print your own) here:
Of course, anyone else is free to do the same.
Happy 3D printing!