Always worth checking a local scrap merchant who might have got an old frame for the aluminium scrap value. We broke one of the plastic joints on a Homebase "pop-up" gazebo. Local scrappie had a similar frame in the corner of his barn. The plastic joint fitted, but I had to use new screws as the holes were a slightly different size. Have had it up since and it works. Good hunting.
Bill Sibley
August 2009