3SX is the only source I found after spending several weeks searching for parts. They are getting brand new parts from Japan.
2nd Gear
AWD Transmission Internals - GEARS*-*Mitsubishi 3000GT*/*Dodge Stealth
Hub and Sleeve Sets
AWD Transmission Internals - Hub & Sleeve Sets*-*Mitsubishi 3000GT*/*Dodge Stealth
ImportPower (sp?) usually seems to chime in when I have questions. I would try contacting him or 3sx directly