They are not all official sheets, but this thread might have something to help with what you are looking for. I agree with you on wanting a more detailed character sheet, which is one reason why I modified one myself and shared it. Extended Chacrater and Starship sheets Considering a number of people have done the same, I am not sure that Modiphius will put time and effort into doing it themselves, which is unfortunate for those who have not searched for or gone looking for either this forum or other fan sites.
Another one of my product wishes is a Shipyard and Starbase supplement, with more ship frames and mission profiles as well as starbase frames and mission profiles. Obviously those already provided in current packages need not be in it, but it would be nice to have alternate stats for alien & adversary ships. (Example being: Klingon/Romulan/Cardassian/Dominion Ship frames and faction-specific mission profiles to allow a quick and easy assembly of specialized starships.)