I actually have an extra Latch Assembly that came off my 1991 GT. It's in perfect working order and will part with it for $40 + shipping if you still need it. Let me know...
I had the same problem on my 90 gt, and so did my brother on his 91lx, I half assed it and just wrapped elecrtical tape around the whole striker, It can be a pain, but just wrap the bottom