Mme. Filliozat informs me that Bizot printed an edition of Kaccayana
in Cambodia, in Khmer script, possibly with Khmer explanatory text
--and that she only know of it, but has never seen a copy.  She said
it was based on his working closely with a Cambodian monk, and will
reflect the (pre-revolution) traditional method of teaching Kaccayana
that was prevalent in Cambodian monasticism at the time.

Sounds stimulating.

Does anyone have publication data (or even a title) for this work?

E.M.