Solenoid is around $48.00.  

New starter retails for $679
or around $480 reman'd, 
estimates for rebuild around $180.

The SD33 uses a Hitachi S13-14 starter, 
http://wagoneers.com/FSJ/rigs/1986-CJ10A/2009_Feb_19_starter/
http://wagoneers.com/FSJ/rigs/1986-CJ10A/2009_Feb_19_starter/P1090103.jpg
called Forklifts NW they list a Nissan
part number of 23300-Z5515, list price $670.29.