Pretty sure that this is the part number you need to look for, for the complete full inner liner . . .

https://www.moparpartscanada.ca/oem-parts/mopar-liner-kit-wheelhouse-shield-splash-55276323ab/?c=Zz1ib2R5JnM9ZnJvbnQtYW5kLXNpZGUtcGFuZWxzJmk9VEEwMjcwMDUmcj0xMyZhPWRvZGdlJm89cmFtLTI1MDAmeT0yMDA0JnQ9c2x0JmU9NS05bC1sNi1kaWVzZWw%3D

I know it says it is for 2500, but pretty sure it is same for 1500 . . . well worth the $$$ to keep all the crap from getting back up into the box area that you need to keep spraying clean (or should be) . . .

or try this link :

https://www.factorychryslerparts.co...heel-House-Right/4378736/55276322AB.html