Maxtrax lift kit is the way to go for 2wd RAMs, they make one specifically for the EcoD too. You need more than spindles, you also need extended brake lines, rear coils sway bar and track bar brackets, different length rear shocks, etc...A proper lift is something you should not cheap out on. It will effect reliability and ride comfort. If you are going to do it, do it right and spend the little extra money on a quality brand that offers quality products.
Message me and I can offer you a quote.