To fix my spoiler (or lack thereof) issue, I just ordered a TRD rear trunk spoiler from japanparts.com
Considering the price I was able to get it for painted and the seemingly lack of availability of the 5axis and Stivo spoilers (and some potential fitment issues), opted to spend a few more bucks to get something TRD.
I wasn't particularly fond of drilling into my trunk but I met someone local who has it on their whiteout and did the install and said the install wasn't that difficult.
