In case you haven’t seen, Les Éditions du Quotidien has announced that it is ceasing production of its publications:
Tradition (last issue no 26, May 2019)
Gloire & Empire (last issue no 85, June 2019)
Revue Napoléon (last issue no 26, August 2017)
The reason given is falling sales over several years. Back issues are still available from www.lelivrechezvous.fr