DDK - Die Deutschen Klassiker

I want to get an immobiliser fitted to my 911 and, dull question aimed at the SW London collective,
can anyone suggest a decent place in whom I can place my trust to do the work neatly and efficiently?

I could roll up at just any old installers, but if there's someone good out there...

Thanks!

I used NSJ audio in Sheen. They fitted a Cat 1 alarm and Imob to my car in the summer and I've been pleased with the results so far. The guys at Classic Chrome (who are based across the road) use them for their cars...good price too.