Anyway, if you have ever thought about replacing the doors (or adding some if you don't have any) on your fireplace, I hope this post gives you encouragement to do so because it's easy.
There are many videos on YouTube that document the process, but the take away is the doors are attached via a couple clamps to a lintel bar at the top (which if you're replacing a door this will already exist) and with two screws and brackets to the bottom of the fireplace.
Most doors that you purchase from a fireplace store, Home Depot or Lowes will fit openings within a specified range and will come with attached screens. You'll want to measure the height and width of the opening of your firebox then find a door that's size-range will fit.
In our case, I went with this door from Home Depot for $399.
I don't have a lot of pictures of the process but I've included a few pictures of what we were dealing with before the new doors and after they were installed.