I am not able to provide any guidance regarding your question. Rather, I have a caution -- The dual zone system is the only significant problem I have had with my 2005 in 70,000 miles. I would have 60 degrees less on my side and DW would have 80 degrees on her side. While under warranty, I had the truck at the dealer's on multiple occasions and a few times for multiple days for Dodge to deal with this. It now works fine but if I had known what a pita this would be, I would have pursued single controls.
So, beware of what you seek --