Bolt in roll bar look to Wolfe Racecraft. http://www.wolferacecraft.com/detail.aspx?ID=240
You can get it powdercoated finished like that one pictured too. As for the manta stripe.... I would think you could use manta option on both coupe/t-top/vert. If I am wrong I hope someone will chime in and help so I can be informed if I am incorrect. If you think of more questions I'll be around the boards and check the vert section often as I own a vert.
The stripe should be the same for all trim options on the Camaro. The stripe itself does not go onto the roof on the t-top or hardtop, so all you will need is the hood and trunk part anyway, which should match up perfect.