Technical better brakes for turbo X19?

[biggaitch]

hi folks.....is there a proven upgrade for standard X19 brakes , to stop a 140mph turbo version??
would like peoples knowledge on this please....Biggaitch

 

[purf]

Fiat mk2 punto GT callipers fit. Need 14 inch wheels. I think coupe callipers may fit also but need much bigger wheels, I think the coupe 20vr had Brembo's Iirc