I am looking for the complete edition of the '6 messes faciles pour l'orgue' from F.J Fétis. The messe n°6 is available here, but not the 5 others. The full set was re-edited at the end of the XXe by the Documentation Centre for organ at Furnes (B); but it looks as if this reprint is not available for sale anymore.
Thanks a lot if anyone knows how or where to retrieve it !