F(x)tec never had all the driver sources. And even if they did, they would not have been allowed to publish them. A prominent exception is the keyboard, which is the one hardware component they developed themselves. The rest of the hard- and software came from a Chinese OEM.
The idea that f(x)tec ever wanted to make the Pro1/Pro1X "open" phones is a misconception introduced by some media and bloggers. F(x)tec never publicly corrected that misunderstanding, presumably as they hoped to profit from all that "Linux-phone" hype. In reality, the Pro1 was designed as a pretty standard, proprieta