2005 pcm

My favorite place to check for new parts is http://www.moparpartsamerica.com/
If you register you can download PDF files with complete parts lists.
According to the catalog it lists the PN for an 05 computer as 56028930AB
I'm sure it has been superseded, but it is a good starting point.
Their price on it is $342.50

I also like to look for used parts on Car-Part.com http://car-part.com/
Just a quick search shows lots computers ranging in price from about $100 to $250. You may even find a listing from a salvage yard that is close to you.