Manuals?
TU154, take heart.
The conventional approach would be to use the airframe builder's figures as the bible for runway performance. Why so many consider the figures from an aircraft's designer and manufacturer authoritative I can't pretend to know.
OTOH, why not just find a source that makes the aircraft performance match runway available?
Is the glass half empty, as Airbus might have it, or half full, as per Wiki?
Sort of like inductive versus deductive reasoning.
The trees off the departure end are probably not that hard.
I hope I didn't need to add a smiley.