We replaced the blind at our dinette on our 2010 Jay Flight 22FB with exact duplicate from Lowes for about $10. It even fit in the existing brackets. Just need to shorten it by about 8" (looks easy to do). Just haven't gotten around to doing it, as we've not been out camping yet.
Check out Blindster on line. Had replacement made for the front window I also did 12 roll up shade for our porch from them. Nice quality reasonable prices.
blindster.com