We replaced ours with curtains we made ourselves.
Command hooks are a super easy way to hang curtains. 37 RV Hacks That Will Make You A Happy Camper
DIY rope curtain tie back holding outdoor curtain
RV Hack -add black out curtains using a tension rod and inexpensive curtain panels ::OrganizingMadeFun.com
Custom Kids Bunk Beds get a fun and fresh look with the addition of DIY Nautical Beach House curtains.