I need to purchase the complete door opening and locking mechanism for the sliding cargo door.

 

Year model ?

 

This is who I used for the same part (if it's the door latch you ask about) on my '99 about 3 or so years ago, think I paid $140?? at that time...

http://www.factorymoparparts.com/oe-mopar/55275378af

Mopar Part 55275378AF

Try Amazon-Ebay too but don't think prices on these vary too much, you might find one a lil bit cheaper... who knows

 

ck out your local junk yards