It's a few years ago since they did mine and I just dropped the car off with them, things have obviously changed. I did speak to Bexhill gearboxes at the time but they had already put new 1st and 2nd sychros in it under a warranty job for SLM and then it needed a load of bearings replaced at 54K so not sure what had happened so thought I'd try somewhere else.
Quick Google Search came up with these guys but a bit out of the way in Crawley
http://www.pandrgearboxes.co.uk/pand...xes-pages/Home