Not sure of part#, but yes, Aqua-Bloc is the trade name for the water-seperating membrame on all Racor/OEM fuel filters (for the 6.0 filter regardless if it is for the truck or van).
You can check filtersonline.com for great pricing or check if you have a local Int'l truck dealer and buy from them. You want the 2-filter kit but not sure of the Int'l part number off hand.