Where to get parts for a Savage Bros depositing pump? Factory refuses to sell them to me.

I need the rubber piston, heater, check valves and o-rings for a Savage Bros. depositor for a 50-lb tempering kettle.  After contacting them, they refused to sell me any parts and insisted I send in the pump (from Guatemala!) and pay a $100/hour labor/diagnostics fee.  I know what's wrong, I just need the parts!  Talk about absolutely appalling customer service!  This is the last thing I ever buy from Savage Bros!