If memory serves Laguna bought the supermax out 5 or 10 years back. You might be able to get the parts from them. Back when I was at woodcraft several years ago they did not have great customer service, that may have changed.
try partsselect.com
boshco, is a used machine dealer they might point you in the right direction for parts.
as for someone who willl come and fix the machine, most of the repair places tend to only deal with commercial and industrial machines. Assuming they do work on Supermax it also would cost a pretty penny for the work.
good luck.