Derailleur thingy...can I get one?

Hey all,
So recently my hearing and derailleur have been a bit temperamental to say the least,
Kids at school, no chores to do, time to inspect....
Off the derailleur came, cleaning up nicely, ooh what’s that?!
There a little bracket that acts as the stop it the b limit screw that has snapped, problem is, I’ve no idea what they’re called or where to find one, so... calling the masses for help....


So recently my hearing and derailleur have been a bit temperamental to say the least,
Kids at school, no chores to do, time to inspect....
Off the derailleur came, cleaning up nicely, ooh what’s that?!
There a little bracket that acts as the stop it the b limit screw that has snapped, problem is, I’ve no idea what they’re called or where to find one, so... calling the masses for help....


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EDIT: https://www.sjscycles.co.uk/gear-spares-shimano-rear-derailleurs/?type=b-axle+assembly