Ihave just changed my box on my mk1 sporting. Hard to find and are fairly rare mine was £80. To have it fitted some garages ask £300, tell them to foook off as a punto is one of the easiest to do. You can get them down to around £150 if you dont wanna do yourself.
Ihave a whole car for spares if you're intersted... has a water leak and long Mot and tax. It's a mk1 95 black 5 door with 115k and stamped service history.
£300