Most people who are interested will build their own.
Just about any CNC platform can be converted to a 3d printer.
The designs for print heads and entire machines are many, with completed parts available on ebay for quite some time now.
They might convert a CNC to the type of 3D printer that squirts out a stream of plastic, but the ones that make high-strength parts by sintering plastic powder with a laser are a different technology.
What was the movie where some guy made a gun of wood to take out a politician?
Held it under the table and assembled it there too.