Yes, I should eventually compile all these into a single thread...
Here are a few more fingerings for the high notes on my Stowasser. YMMV
Eb: LH: high octave key, 3 / RH: both side keys, 1, F natural key, Eb pinky key
F: LH: high octave key, top D trill key, 2, 3 / RH: 2, 3, Eb pinky key (or not, raises pitch)
These are both pretty will in tune and stable--if you can do altissimo on sax these are not difficult.