Welcome to LOST
The dealership is expensive but not that expensive - they misread the manual - the filter and head - normally runs about $150 - the filter only - typically runs about $30 - and the names are fuel filter vs water fuel seperator.
I think you can get a Wix verson at NAPA store for about $20 - or cheaper on ebay (haven't tried that)
This is Mopar Parts
http://www.trademotion.com/partlocator/index.cfm?action=getJointLocator&siteid=214583
doesn't look like the link kept the info
filter only - Fuel system/Fuel system components/fuel filter - 25.80
the confusion is in
Fuel system/fuel supply/diesel fuel supply/fuel water separator - 101.97 - you only need this if the fuel head is leaking - and you'd be better off getting a racor (if you're out of warranty).
Racor
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?t=25537&highlight=racor
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2005 CRD
stuffSkeptic quod gratis asseritur, gratis negatur