The only way to go is the "muffler shop special" route.
Thermal, apexi ws, mugen twin loop (but to pricy even if it did fit), RS*R and countless other good brands do not make a good full cat back for sol's.
Soon I am going to have to go back and put a resonator in my thermal "system" It has been loud since the day I got it and it has gotten even louder over the winter (unless I am just not used to the sound of it with the top down yet)