Wrapped door panels.....
I took the checkerboard off the stock fiber-board panels, and wrapped them myself.
Batting/Padding, plus vinyl, and adhesive cost me about 50.00 at the local fabric store. The upper plastic, the handle bucket, and the arm rest were painted with black interior paint/plastic paint.
The material to do all 4 panels plus the other interior plastics (but the dash) will cost me total of about 75.00 to change over the interior....not too bad.