Thats the Fiat part number they start with 4 and have an F on the end .......
The whole assembly is USD$486.20 (AUD$725) at Mopar Parts Giant, normally USD$738 (AUD$1086) add some freight and crapolla.. just buy 2 Ebayers and cross your fingers I reckon........... none on Rockauto.
https://www.moparpartsgiant.com/part...Overland%204WD)