Are there any differences in T-Tops?

I have a 1992 with the Lexan tops. They are all cracked looking. I saw some for sale local from an '87 model.

Can I get the glass tops from another model year?

 

I have a '91 Bird, and I also had the lexxan t-tops, that were scratched the hell. I pulled some glass t-tops from an '87 Bird, and they've worked just fine. No leaks.

My only suggestion would be... check how your t-top weatherstripping is. It's it's older, it could have molded to fit your particular t-tops, and with years gone by, the t-tops can warp a little, and so the glass one's you get might not fit exactly the same, causing some leaks.