I saw this recently on the Talk Polywell forums:
http://3dprintingindustry.com/2014/09/02/tungsten-checks-smit-röntgen-unveils-3d-tungsten-printing-technology/
With such useful properties, a number of firms and institutions have begun researching the ability to 3D print objects made from the metal, including ExOne, which partnered with rp+m to develop Tungsten additive manufacturing and CVMR Corporation, which is working to make its own industrial machines to print with Tungsten powders. Philips-owned Smit Röntgen, previously a manufacturer of medical imaging parts, has just broken into the 3D printing industry with their proprietary laser melting process for additively manufacturing Tungsten components.
For LPP’s purposes I believe 3D printing, at least in its present state, doesn’t come close to the precision required for the electrodes. However, I decided to post this here just in case it could be useful.