You can buy the 4.8is flared wheel arches ($160 apiece), the lower LeMans flare sections ($20 apiece), and the front flared wheel arches ($160 apiece), plus your assorted clips and fasteners. The retrofit kit may be NLA as a total set but you can purchase individually the below:

51 11 1 944 537 -- EXPANDING RIVET --------------------- 6
51 11 7 073 517 -- MOUNTING PARTS SET (REAR SUPPORTS) -- 1
51 12 7 148 517 -- REAR SUPPORT BUMPER TRIM, LEFT ------ 1
51 12 7 148 518 -- REAR SUPPORT BUMPER TRIM, RIGHT ----- 1
51 71 7 002 953 -- BLIND RIVET ------------------------- 30
51 71 7 049 867 -- FLARED WHEEL ARCH, FRONT LEFT ------- 1
51 71 7 049 868 -- FLARED WHEEL ARCH, FRONT RIGHT ------ 1
51 71 7 049 869 -- FLARED WHEEL ARCH, REAR LEFT -------- 1
51 71 7 049 870 -- FLARED WHEEL ARCH, REAR RIGHT ------- 1
51 71 8 219 511 -- BLIND RIVET ------------------------- 2

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards