You are asking for the impossible. With the exception of a blanket yes or no by authors like Anne Rice or Joss Wheadon, a fan can not ask for such permission.

• Authors are advised not to pay too much attention to fanfic for legal reasons.
  
• The nature of email contact to writers makes a direct communication unlikely.
  
• It might be generally impossible to contact the authors in several instances. In the case of SGA, there are several writers whose email address are unknown, rendering you unable to ever contact them. Are you able to tell me the email address of the writer who wrote the episode introducing the Wraith Queen?
  

In conclusion: You can not apply this kind of politeness to yourself.