I think only a handful of that "Air Ambulance" version were ever built. The Riverside PD in the USA have a D-model with the same modification but seem to fly it in standard configuration. I think the 240-Robert-style bubble rear doors might have been more popular when it came to lifting stretcher cases.
Here is a recent video of "The Quiet One". C-model airframe with a five-blade main head and a four-blade tail rotor. The ultimate Y-tailed 500!
500 Fan.