The MOPAR filters are available on AMAZON for $70 for BOTH combined. They are OE. Buy the Lisle filter wrench for the primary filter to remove the water sensor. Strap wrench will work on the filter it's self. Be sure to drain first. The engine mounted filter is not biggie either. 1 1/8" 6 point 1/2" drive socket with wobbly then about 12" of extension and 1/2" ratchet will bust the cap loose.
Dodge Ram 6.7 Liter Diesel Fuel Filter Water Separator Set Mopar OEM
Sold by: Athens Dodge Chrysler Jeep
$70.00
Lisle 34900 OEM Water Sensor Wrench
Sold by: Amazon.com LLC
$9.97