as a lefty 5er Player, maybe you should go the way @Ric5 went. just get a lefty t-bird Body, a 5er P or J neck and go fenderbird!
Sounds awesome! Building a bass is actually on my bucket list ( not like id do a good job but it would be fun ) i just wish i had the time to do so or the experience for that matter though as of now that sounds like my best shot