Yes, most RV stores would have some type of cover, but I have not seen one like yours. Simular, yes, but not as neat as the old style seems to be, not a well made as well perhaps. I have my cover "door" taped on, one side of the "hinge" broke off two years ago. I had been making a temperary hinge with white duck tape, but this year I used white vinyl tape.
I want to put off having to take out the rivets.