A Punto 1.2 8V (Not 16V) '60' Gearbox will fit into your Bravo, however the ratios will be shoter thus giving the car better acceleration and higher fuel consumption on motorway driving (well if you keep below 70 then it's okay)
Or Alternatively obviously a Brava/o 1.2 16V Gearbox.
You'd be lookng around the ~£200 mark for a gearbox and another £100-£150 to fit it.