I know this may not be what you have in mind but having just lost my BFF from girlhood I only wish I had this myself. Take your friend with you to have a photo done of the two of you together. Ideally it would be in the chair but since that may not be possible, have someone come and take the photo at your home. This way you both have the picture and that will last forever. What I would do to have a picture of my longtime friend with me. Frame the picture and gift it to her. Again just a thought.