I guess this is from season 2? I just scrolled through all of season 1 (it's featured this month on Prime), and the only wagon I saw was a burgundy Cutlass Ciera with woodgrain siding.

MGM+ (new name for EPIX) is part of my cable package, but it doesn't have a scroll bar, so if I know which ep to look at, I might be able to give you more info.