I have no idea, although I do have an Apache Bordeaux! I once considered changing my steel poles for lightweight ones and about the only people I spoke to who knew Apache awnings inside-and-out where Broad Lane Leisure, where a young lady from their Alcester branch seemed to know her stuff. She was honest enough to advise that my current steel pole set was stronger and that I should keep with them unless weight was an issue. Perhaps they could advise if you give them a call.
Geoff
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I have an Apache tall annexe although it wasn't used on an Apache awning but a Conway Cruiser. I'll measure the connecting zip and let you know tomorrow if that's any use.
Zip measures 201 inches, its a chunky zip with an A on it. Not sure if I can advertise on the board but I am going to sell my annex if you are interested.