Try architects instead. Architects are also permitted to do structural design work.
I had trouble finding a structural engineer as well when I needed someone to provide the structural load calculations that were required to submit the plans for an after-the-fact building permit on our shop building. I did finally find a local structural engineer to do it. The local architects would do it, but they were booked with work already and it would take too long for them to get around to what I needed.
You can also try the local government office where building permit plans are reviewed for approval. One of their reviewers may be willing to help you on the side, or they may be able to direct you to someone that can. They knew the structural engineer that I finally got to help me.
Be prepared to spend some money though. What you seek is not cheap.
Forget about your 50 small panes of glass. You have bigger problems to worry about. With no foundation and the framing members pulling away from one another, to think that you can just jack it back up or something is a bit hopeful to say the least. Any way you look at it, you are going to need to do some demolition and re-framing.
Be prepared to receive advice that you may be best off rebuilding from scratch. You can probably salvage and reuse portions of what you have. But you have a major project on your hands.
Take a look at what lakee911 did (very nice work) http://www.reefcentral.com/forums/showthread.php?s=&threadid=1093532
This may give you a good idea of what your situation might entail.