I have just read an article in Sept hi-finews about VPI's 3D Printed JMW-3D unipivot tonearm & it looks quite tasty.
Some links
http://vpiindustries.com/tone-3d.htm
http://www.digitaltrends.com/home-theater/vpi-makes-the-worlds-first-3d-printed-tonearm-for-turntables/
http://www.analogplanet.com/content/vpi-debuts-new-3d-printer-one-piece-jmw-memorial-tonearm-and-new-direct-drive-turntable-moto

Some links
http://vpiindustries.com/tone-3d.htm
http://www.digitaltrends.com/home-theater/vpi-makes-the-worlds-first-3d-printed-tonearm-for-turntables/
http://www.analogplanet.com/content/vpi-debuts-new-3d-printer-one-piece-jmw-memorial-tonearm-and-new-direct-drive-turntable-moto