We can help! seat pans can easily be switched out on the ergoCentric chairs. Often for those with Sciatica we will use our Triple Density Foam option which makes the sit softer and more comfortable. We can also use more foam towards the middle of the seat to build it up so the contour is not as much of an issue. This should help your client feel more comfortable and at the same time means that she doesn't have to purchase a whole new chair. I would be happy to assist the client if you would like to put me in touch with her. Thanks. Ken Hammond, ergoCentric Seating. 905-464-4075.