not that I am aware of, sorry.
What I would say, if you are going to do mobile hot stone, then charge a lot more as it is a hell of a hassle.
Time 1: The stones and heater are heavy, so 1 extra trip to and from the car.
Time 2: You need heating time, 20 minutes, which will be longer than your set up and consultation time.
Space! Where are you going to put them? Where is the nearest plug? Does your client mind you placing a heavy waterfilled container on her furniture or floor.
Space 2! Where will you put the spent stones?
Time 3: to clean the stones, will you do that at your clients home or have to clean them at home? what if you have a few to do in one day.
Time 4: don't forget that extra journey to and from the car again!
what works out as an hour's treatment, really equates to 45 minutes extra set-up time, hence why I charge £7 more for hot stone.
I have done HSM as mobile, but its usually at a pamper party where a few people have booked it.