There is a pair of shops next door to each other in Stoneham, Massachusetts, that do really excellent work.
JK Automotive Designs has a really nice custom installation for the BlackVue dashcam as well as radar detectors, if needed.
And right next door (they share a parking area and driveway) is Unique Car Care, which can do the detailing and film. Both are very accustomed to the highest end cars and do it with skill and genuine customer care.
They work regularly together and can coordinate so it all can be done in a couple of days.