You can google “raven interview prep” and contact them through their website. Or try “aviation interview prep” and reach out to Cage or Emerald Coast. I used Emerald Coast and it was a good experience. I’m not aware of some secret JetBlue prep company though. They just changed the interview format anyway, so a lot of the old gouge is no longer applicable. It’s still good to understand how to talk about yourself and how to use specific experiences you’ve had to illustrate whatever trait the interviewers are trying to assess. I think most reputable interview prep companies will help you do that.