2007 Limited AC evaparator core replacement?

[Atlanta Dan]

Hey guys, my kids 2007 Limited has a leak in the evaparator core. I went to rock auto to find a new core and there are several listed for the front. Called the dealer and they only sell the whole evap box/housing with blower motor and casing etc for $463. The evap cores on rock are around $70 but need to know which one to order. The Ford part for whole housing is 7l1z19b555db. Cn someone help me figure out which one to order? VIN is 1FMU19597LA76744

Thank you, Dan