Yes, the Volvo 240 had this, and the little Toyota Corrola I had also had it, made for eat installation. Change the relay, wire up to the existing plug, and off you go.
The Indicator Relay I got for the T2, had a small beeper, and an output so you can add your own indicator. I put a bit of tape over the beeper built in and mounted it behind the read trim panel, and ran a light to the front of the car. On my T2, the cubby hole in front of the gear levers has 3 little indents on each side of it, and they are perfect for the old style push-in warning light to mount in, so I put a green one in there.