As covered in this question, the Raspberry Pi isn't open source. However, if one were to manually buy all the components on the board and solder them in an identical manner, what further steps would be required to turn it into an actually functioning board?
If your idea is to make an exact carbon copy of the Pi 2, you won't succeed. While @joan stated that the OTP contents are not shared to the public, the actual SoC is also not available. The BCM2836 is a custom design for the Raspberry Pi Foundation and I doubt it is available through the common channels.
That being said there is a wide variety of Raspberry-like-a-likes on the market. There's of course the Arduino (which is also being cloned or even counterfeited) and the Beagleboard. Then there are is the Odroid, the Banana, the Pandaboard, the pcDuino, the Intel Galileo and at least ten more.
Obviously copying the Raspberry Pi will result in a lawsuit. But if your goal is to create a custom platform for your specific application, partnering up with an OEM might be a solution. And if you need a vast amount of boards (1,000+) I'm sure some of the above cloners are up for helping you with that.