Did they confirm that superglue is the correct glue?
Are you sure about the size of the armour?
This is the thinnest 355er tube I know:
https://www.ginkgo-veloteile.de/ginkgoshop/Laufradzubehoer/Reifen-Schlaeuche/Reifen-355-mm/JK-Schlauch-25-28-355mm-76gr.html