Myself and Hotwire make the plug n play harness that you need. It can get a little overwhelming at time for people who are 100% comfortable with wiring and diagrams. I have to redo more people attempted harness' than anything. If you have a few Dodge wiring diagrams for your engine. The correct donor harness , the tools and the time. You can do it yourself.
You just have to weigh time and effort over cost.