There appears to be just two electronic components in the parts list - both capacitors which may be bought from any electronics supplier...
Capacitor Aluminium 12 uF 75ºC 10% 250V AC
Capacitor Oil 100 uF 125V AC 35x55mm
And a defrost timer assembly
TIMER-DEFROST;-,110V,50~60Hz,
which will have to come from a specialist spares supplier
P, October 2009