Although I've never used Airbus PEP, I'm surprised to hear that the PEP is the only soure of performance data made available by Airbus.
Surely Airbus (and all manufacturers) are obligated to provide a paper AFM since not every operator will have or want to use the PEP and in addition to which, unless the operator is totally paperlerss, the AFM is normally carried onboard the aircraft. Furthermore, the AFM provides a total and comprehensive source of certified performance data that includes all assumptions and limitations as guidance for operators when using such performance data.
Would appreciate any further enlightenment on this...