Le Conte du Graal online:
There is a transcription of the Paris MS. at the University of Ottawa: Le Conte du Graal (Perceval)
At Stanford:
Lecoy's edition (based on the "Guiot" manuscript) -lines 1-267.
Roach's edition (based on the "T" manuscript) -lines 1-267.
These in Old French, of course.
Malcolm