BUILDING A PHASE CONVERTER
http://www.metalwebnews.com/howto/ph-conv/ph-conv.html

Buy a phase converter $550
http://www.phaseconverter.com/#Rotary-Converter

Buy a single phase motor $350
(check rpm, hopefully the planer is belt driven & you can change
pulley sizes)
www.mcmaster.com

have mfr switch out the motor or buy a single phase & sell the 3 phase

cheers
Bob