The time finally came, I'm sick of the ride on the stock air bags. A month or two ago I purchased an Overland Warehouse coil-over kit for the front. About a week after I got them, it was announced that they are going out of business. I was lucky enough to find a guy selling a OW rear kit to match my front last week. A few months back I also found a guy selling the isolators that go on top of the coils, got them for $15 instead of paying the $120+ for new. I went to Home Depot and purchased a small metal strip to use for the brackets, got those made yesterday. Today, I did the conversion. It was all very straightforward, although it did take me some time to figure out how to disconnect the air line (you undo a clip but the line is still connected, you have to pull pretty hard on the line to get it disconnected). Overall the job took 3 hours and ride height appears to be perfect. I'll know more when I get more miles on and it settles (only about 10 miles so far). Initial impression is that the ride quality is greatly improved, definitely from the coils (I ran with just the OW shocks, which are made by Radflo, for about a week and it wasn't much different).
I just wanted to say thank you to each of you that commented on this thread. It was a very simple project, but going in I was making it out to be way more complicated. Without this thread, I probably would not have considered doing this myself. In the end, glad I did.
What I used to connect the lower brackets, may not be the strongest but I don't expect these to get much pressure:
Close up of the brackets:
Again, thanks to all who posted here to help me get this done.