I have a sofa and love seat that I purchased about 9 years ago. A Rowe, Jenny model. The back pillows are down and have no shape as you can see in the photo (taken after fluffing it). We are looking to buy a new set, but in the meantime, I wonder if there is anything simple or not overly expensive to give the back cushions more vertical form. I would consider replacing the filling if there is a low price way. Maybe I should fill it with spray foam insulation (just kidding).

Hopefully the photo posts

Thanks