www.cal-mustang.com is always a favorite
i like cloth tops honestly...and ive never put one on, because if you mess up the folding a little bit youll get a hole...the new top on our 90gt was installed a little off and the thing had a hole starting through the fabric in a little under a year...and that was professionally installed...always go with glass windows on the rear....plastic are horrible...after a while they just muck up and you cant see through them anymore...the glass is just much more reliable...
i dunno anything about LX kits....but many here do....and cal-mustang.com should have body kits for you....
-jonathon