cars and concepts being long gone has presented me with a problem. what to do with broken latches and leaking weatherstripping. I refer to the pontiac gods to answer this. Thanks to all.  

try looking at the other t-top weatherstripping (Hurst/Fisher) and see if it could possibly be fitted together. As far as the latches, I would try to purchase a parts car with them.
It is, unfortunately, tough with these dealer options