Haydn operas

[Fernando]

Baerenreiter has published some critical editions of Haydn's operas, but I would like to know if these operas, or at least the overtures, also exist in a public domain edition (maybe as part of a Gesamtausgabe or something like that).

Thank you in advance!!

[vinteuil]

B&H published a haydn complete edition, but it has not been fully reprinted, and is therefore very hard to obtain.