Gents -
I love my 90 Mx5 and about 5 years ago replaced the soft top. over this past winter, made the mistake of pulling up the top in the garage in very cold weather cracking the plastic rear window. I'm assuming I need to buy a new top all over again since there probably are no places in the Batlimore-DC region that will sew in a new one. open to recommendations.

 

I would be surprised if you had to replace the entire top for the rear window but again I am no expert. You should check out the Miata dot net forum. I bet if you ask the question there, you will get 80 responses in about 10 minutes. Good luck.