Here is a Plane Plastics Stationary Panel. Their part number is K0 413467-5. Their current listing price is $155 plus shipping. I have a new unused one for $100 plus shipping from the Columbus, Ohio area. Photos are of the actual item..
If your lower Panel is disintegrating due to UV like mine was, this is a great deal. Especially if you can pick up in person and avoid shipping. I used this part to complete my instrument panel update. It is a much heavier ABS plastic than the original Cessna Royalite. I painted it with SEM paint which is designed for plastic. I was able to keep the pilot side switches and fuse panel. That got cleaned up, new switches and new labels. Replacing that switch panel is a bear. But if it’s still good, Barney’s panel will work great.