Jumpseating/Non-Reving to London STN from JFK on AA

[Smash312]

I was heading back to London Stansted on a regular basis out of JFK. First on Maxjet ($7 to London) and then on EOS ($2.50 to London). Both were class outfits and got me to London Stansted with no problems what so ever (they'll be missed by me for sure!) Now I know AA are the only other carrier going into STN and would like to know what an offline pilot like me would have to do to 'Jumpseat' (rather Non-Rev) across to STN from JFK. I know sitting in the cockpit is out of the question internationally - but are there any chances of getting a seat in the back WITHOUT doing a ID-90/ZED fare?

If anyone has a clue - please do help!

Thanks!