To be honest, I know you don't have one.
http://www.swtor.com/community/showthread.php?t=320129
Anyway, for me, the unique shell is one of the two reasons I bother with the quest line on new characters, since the shell can't be acquired in any other way. My guild mater in particular is annoyed that he vendored his Saber Marshal's Robe more than a year ago. If the OP wants that shell, he should consider rerolling.