The complete kit is on sale at Dexter for $28 Dexter Axle kit P/N K71-720-00 but I'm sure they are the same "China Finest" that are in the 5r now. Looking for the parts around the web each wheel parts using Timkin would be around ~$62 plus 4 seals ($20). I did notice that the etrailer parts are from China. At least in the pix.
2018 Montana 3791RD
2017 Ram 3500 DRW 6.7 Cummins Aisin, B&W RVK3600