Here's the Sony mid in the door. I imagine I could've re-used the baffle to install the JL mid, but I chose to use an inexpensive aftermarket one instead. I thought about using MDF but at this point I'm just looking for a quick fix. Down the road I might make a better one.
Here's a mounting ring that fits behind the OEM Sony baffle. I didn't use this because the baffle I chose to use fit right up against the metal door panel nice and flush.
Another shot of the Sony mid. Not a bad looking speaker compared to other OEM ones I've seen.
Here's a couple of pics of the Sony mid vs. the JL. Dimensions are fairly close. The JL is a little deeper but there's plenty of room for it in the door. Notice the passive crossovers built into the Sony. I had assumed that since it had these the Sony amp was not using any active crossovers. But it does.