According to my 2006 Mopar parts book, 05142393AB is the correct p/n for the Mopar fog light lens.
21 55077917AB LAMP, Fog (the entire assembly)
05142393AB LENS, Fog Lamp
05142394AA BEZEL, Fog Lamp
05143393AA WIRING, Fog Lamp
L00H355W BULB, Fog Lamp, H-3 55 WATT
The part number you gave is for the entire fog light assembly which includes everything.
But what is curious is if I search for just the lens, which is p/n 05142393AB it only comes up as the entire lamp assembly which includes the enclosure, bulb, lens, bezel, etc. so maybe the lens itself is not available separately on-line?
I would at least ask the dealer if they can get 05142393AB which is just the lens by itself.