I've got an old style Tripp Trapp chair with a high back and am trying to find a baby cushion so I can use if for DD. I didn't realised they'd changed the design and don't want to have to buy a whole new baby bit for my DD's new (new style) chair when I've already got most of what I need from DS's old chair. Does anyone know where I can get an old cushion or have one spare - don't mind used! Thank you!