Hi Scott if you can get the box open remove locking mech and with a small flat screwdriver force the stainless steel lip that ticks under open enough to remove tumbler put your ign key in and file or belt sand tumblers till they are flat the lock will them work of that key with a small hammer on a hard cardboard,ply surface hammer the lip back down
I’ve done it a few times and it sorts it 👍
take your time good luck
jonmac
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John