Hello Jack,
In cause 3/8 24threats are very close to 10mm (and wasn’t shure about the MORGAN banjobolt) and I was a little tired about the search I had no look further to solve a switch over to the SAAB cylinder.
But I found banjobolts from 3/8 24threats to 12mm „connectors“ a the hose. Which wouldn‘t help.
Greets René