jstrong industries.  they make a molded top with cd,mp3 ipod and satillite ready remote control radio,weather proof radio head unit cover,dome lites,4/6inch marine speakers,fold down light bar/w 4 5 inch 55watt halogen lights,each has own rocker switch,2 extra rocker swithes,with external buss fuse,all pre wired,
it will withstand leaning it against trees and heavy brush,i have one on mine and it is very nice.
they also just came out with a 2 piece fold down windshield that is well made,
take a look at thier site and give them a call...
www.jstrongindustries.com