I'd go on Facebook and look there. You'll have to open an account, if you're not on already (free), and download the app to communicate with sellers. I was looking for replacement wheels for my 2014 3500 and found them there. I went with the 20" 8 lug from a 2020 Ram because I like the solid no plastic style, whereas my 2014 has chrome plastic inserts around the wheel that can peel off on over time. I paid $800 for the wheels that were in near new condition. During my search I saw many 18" Ram wheels for sale.