Designed & 3D print mounts for the rear storage tray. These will fit any 3.5" speaker. Put a kit together that includes quick disconnects, 2 brackets & speaker cloth. Also did a write up, but it's pretty straight forward.
Took me several months and about 40 revisions to get these to this point. Have them installed in multiple cars so far without any issues including a full summer outside with the top up in Miami.
Will sell each kit for $65 including shipping.
I also have designed circuit boards to add heated seats to the 986 using the factory seat heater switch if interested, way cheaper then going the complete factory route and it works with aftermarket seat heaters.