Would RV manufacturer have extra accessories for purchase?

Our TT has a curtain that closes off the bunks in the back. The top couple inches is just mesh, to allow for air circulation... but even so, we found that having the curtain all the way across quickly causes the bunks to get extremely "stuffy". Every night the last person to go to bed tries to remember to pull back that curtain to allow for air movement. Just something to think about when getting new curtains!