Just checked, G.E.A.R.S. is the company name, Peter is the main guy there but the lad who works with him is very good and reconned my rear diff.
Phone number is 01704 535760. Wayne from the GTIROC also used him and he'd been recommended him by someone else locally. I don't know where you live but for people in the NW its a great option.
Cheers,
Jim