We used to have an outfit on the way to Rye Harbour who did lots of exotic stuff. They looked after a number of high end rally cars for high end drivers, and also ran 2 Nissan (Nismo) GTR's in top class racing, even had a dabble into Le Mans 24 - and Porsch Club Kent Region (I was a member at the time) organised a visit round their place, it was phenomenal. Their 2 Nismo GTR's were in bits on the upper floor at the time, amazing seeing GT1 cars in their constituent parts laid out for sorting!! They had an engine test room complete with computer hook-up, exhaust ducting etc, another room with a rolling road test thingy, another room where they could CAD a new piece then send the design to their CAD controlled machines to manufacture that part - they were doing a turbo job on a Lambo at the time, it had been sent to USA for turbo job and USA had made a mess of it! Unfortunately Rye was an offshoot of their main base in the Midlands and is no longer there - shame, I had my 968 side sills sorted there as they were used to working with GRP and carbon fibre bodywork!