Hi Tom
I am uncertain about your question concerning "black-out screens". Our Diplomat came with day/night shades and also what we call bug-screens. Would any of these be what you are referring to?
2007 Diplomats came in different floor plans and they would to a large extend have different size windows. This may well apply to your RV as well, so for that reason I think it would be "risky" to order any kind of screens or blinds based on any kind of assumed similarity.
Good luck with your search.