Have regular passive forms of the verb facere ever been used? If so, what is the first occurrence?
In all of the Latin I have seen, the passive forms of facere are replaced by fieri. Regular passive forms are easy to form (facior, faceris, facitur…) but appear to be completely out of use, at least in classical Latin. Regular passive forms can occur with prefixes like satis- or perhaps prepositions, but in this question I am only interested in the plain facere.
Nigidius (Grammatica) writes: uti 'facit' 'ποιεῖ', ita 'facitur' 'ποιεῖται' est. I would not count this as proper use in a sentence.
If my corpus searches are to be trusted, there are no proper classical uses of faci and other such forms from the present stem. But did such forms ever come to use? If yes, when? If you think such forms were never used, why do you think so?