Best bet is to go custom weld-in cage. They're safer and probably easier to come by than a bolt-in. Cusco makes some bolt-in, but I hear they are unsafe =/
imo, im kind of edgy about a rollcage in a street car. after all when in a accident, you get hit from the side and you head smashes the bar? not to good of a saftey feature in my standing. granted they do look great but cages just seem best to me when used in unison with a helment.
Good luck finding one, that's all I can say really. I have one of their 4-point roll bars and the only way I found it is because it came with my other sol