hey johnwoo. As you might be able to tell my top is fairly new. about a year ago i had to replace the old one because the rear window came out. If you can find the hard top you should get it however you probably wont be able to find one. i called a lot of shops in my area and searched online and could not find a hard top replacement. I was told by a local shop that they are very rare to find for older beamers. so i ended up getting a replacement convertible top. i got a good deal on mine because they were trying to install this top on another persons car and by accident punched a whole through the back window with a screw driver , so i got the top and got them to sew in a new rear window all for 1000 bucks labor and all. you might not be so lucky so i would first see if you could repair the top on your own you can buy a headliner kit and you can also buy a zip in back window replacement if you have the zip in kind i on the other hand had the sewn in kind hope this helps
Tgoode