Looking for an alarm/immobiliser fitter for a '60's car.

[DB7 pilot]

I'm searching for a fitter, preferably from a first hand recommendation, to install an alarm and immobiliser into a '60's Mercedes to comply with my insurers wishes. A certificate must be produced so I can present it to the insurer as proof of correct system, correct installation etc.Close to Leicester University if possible. Many thanks in advance.