Clutch Cable block anchor shattered

I lost my gear selection when the mounting that holds the clutch cable shattered. I believe it was a consequence of the retaining nut slackening of due to vibration. when I depressed the clutch to change gear there was a loud bang and the clutch pedal disabled. The retaining plate for the cable is steel and intact, however the mounting for the plate was part of the original alloy clutch plate housing. Any suggestions short of replacing the whole housing block, thanks.

It's a Renault Megane 1600 Coupe!