They were good cases but I can’t imagine the locks would be that complex or varied. I have no experience of them but there is a specialist key supplier, Aldridge’s. I have no connection but they look worth a shout. They are in Berkshire but do mail order on keys. There doesn’t seem to be a vast range.
If they haven’t got a key then you might need to force it. After all even if you can pick it open you are still stuck with a case you can’t use for fear of snapping it shut. Unless there is a key code inside the case?
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