mjsp

Hello Chrysler experts! My uncle in Bulgaria owns a left-hand drive Grand Voyager 3.3 V6 4x4 and has asked me to help him source a new fuel pump, but none of those that I see on sale seem to match the existing part number, which is 05278630AA / Walbro GRJ411. He says that the fuel pumps for the 4x4 are different than those for the non-4x4 and sit inside a 'tank' (?). Can anyone tell me what I should be buying and who sells such? I can post a picture and provide chassis number if it helps. Thanks for any help!