Thankyou very much for the info and pics, they are exactly the info I need. I don't think I'll be able to duplicate the latches, but the triangular hinges, (I do think thats what they are) are still mounted to the frame. I think they have stops built in to limit the opening to just past 90 degrees. Thanks again Bill, Dave.
PS: I did get your address and will price shipping on Monday. I'll probably call you to confirm as they are quite heavy (#'s= $$$). I'll open them up to inspect and let you know the condition also.