Humm, Lucie I can't remember ever reading where someone found a solution... not to say there isn't however.
Thought you might like to know, Clifton Upholstery Co. in Waco, TX does all the upholstery work for Casita
manufacturing. They also work with owners to customize fabric choices or changes. Maybe they can help you?
Clifton Upholstery Company
416 Mary Ave
Waco, TX 76701
owner Tamara Armstrong