I too have the same door set up and have been worried about it falling off and disappearing as it has the one latch and flops around a bit when closed. With your new door did you come up with a new solution for securing it?
This is what I did on my old '79 after I lost (and found) my door. Its a little different style, but works the same. The latches are Zip-dee aluminum awning latches readily available.
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1994 30' Excella Front Kitchen Trailer
1990 25' Excella Travel trailer
1992 350LE Classic Touring Coach
AIR #13
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