A box from any MK6 1.6/1.8 will do you matey. There is some minor ratio variation, but nothing hugely noticeable. Your car should have a rear started, so best to get a box from a 1996 car onwards.

One thing I'd quite like to try is fitting the internals from a 1.7 Puma box into an Escort. Short gearing might make it quite nippy low down!